{"id":73,"date":"2022-08-16T19:50:14","date_gmt":"2022-08-16T23:50:14","guid":{"rendered":"https:\/\/opentextbc.ca\/alfm2\/?post_type=chapter&p=73"},"modified":"2025-09-18T16:51:39","modified_gmt":"2025-09-18T20:51:39","slug":"unit-3-review-subtraction","status":"publish","type":"chapter","link":"https:\/\/opentextbc.ca\/alfm2\/chapter\/unit-3-review-subtraction\/","title":{"raw":"Unit 3 Review: Subtraction","rendered":"Unit 3 Review: Subtraction"},"content":{"raw":"You will now practice all of the skills you learned in Unit 3. Check your work using the answer key at the end of the review.\r\n
    \r\n \t
  1. Find the differences.\r\n
      \r\n \t
    1. [latex]\\begin{array}[t]{rr}&58\\\\-&24\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
    2. [latex]\\begin{array}[t]{rr}&99\\\\-&65\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
    3. [latex]\\begin{array}[t]{rr}&98\\\\-&75\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
    4. [latex]\\begin{array}[t]{rr}&87\\\\-&34\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
    5. [latex]\\begin{array}[t]{rr}&45\\\\-&21\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
    6. [latex]\\begin{array}[t]{rr}&76\\\\-&35\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
    7. Find the differences.\r\n
        \r\n \t
      1. [latex]\\begin{array}[t]{rr}&995\\\\-&423\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
      2. [latex]\\begin{array}[t]{rr}&987\\\\-&316\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
      3. [latex]\\begin{array}[t]{rr}&579\\\\-&458\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
      4. [latex]\\begin{array}[t]{rr}&877\\\\-&602\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
      5. [latex]\\begin{array}[t]{rr}&468\\\\-&432\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
      6. [latex]\\begin{array}[t]{rr}&686\\\\-&271\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
      7. Find the differences.\r\n
          \r\n \t
        1. [latex]\\begin{array}[t]{rr}&1\\, 265\\\\-& 541\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
        2. [latex]\\begin{array}[t]{rr}&4\\, 587 \\\\-& 534\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
        3. [latex]\\begin{array}[t]{rr}&6 \\,889 \\\\-& 2\\, 506\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
        4. [latex]\\begin{array}[t]{rr}&7 \\,936 \\\\-& 5 \\,104\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
        5. [latex]\\begin{array}[t]{rr}&62\\, 589\\\\-& 1\\, 375\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
        6. [latex]\\begin{array}[t]{rr}&54 \\,567 \\\\-& 3 \\,253\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
        7. [latex]\\begin{array}[t]{rr}&44 \\,293 \\\\-& 13 \\,701\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
        8. [latex]\\begin{array}[t]{rr}&86 \\,477 \\\\-&16 \\,216\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
        9. [latex]\\begin{array}[t]{rr}&37 \\,516 \\\\-& 21\\, 413\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
        10. Rewrite each question in columns and find the differences.\r\n
            \r\n \t
          1. 968 \u2212 343 =<\/li>\r\n \t
          2. 865 \u2212 432 =<\/li>\r\n \t
          3. 7482<\/span> \u2212\u00a0 5061<\/span> =<\/li>\r\n \t
          4. 11589<\/span> \u2212 5326<\/span> =<\/li>\r\n \t
          5. 97383<\/span> \u2212 42362<\/span> =<\/li>\r\n \t
          6. 109861<\/span> \u2212 58240<\/span> =<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
          7. Borrow from the number in the shaded box.\r\n
              \r\n \t
            1. \r\n\r\n\r\n\r\n\r\n\r\n
              <\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
              392<\/th>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n
              <\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n \t
            2. \r\n\r\n\r\n\r\n\r\n\r\n
              <\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
              821<\/th>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n
              <\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n \t
            3. \r\n\r\n\r\n\r\n\r\n\r\n
              <\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
              6739<\/span><\/th>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n
              <\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n \t
            4. \r\n\r\n\r\n\r\n\r\n\r\n
              <\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
              4528<\/span><\/th>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n
              <\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n \t
            5. \r\n\r\n\r\n\r\n\r\n\r\n
              <\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
              24986<\/span><\/th>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n
              <\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n \t
            6. \r\n\r\n\r\n\r\n\r\n\r\n
              <\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
              47182<\/span><\/th>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n
              <\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
            7. Borrow from the number in the shaded box.\r\n
                \r\n \t
              1. \r\n\r\n\r\n\r\n\r\n\r\n\r\n
                <\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
                302<\/th>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n
                <\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n
                <\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n \t
              2. \r\n\r\n\r\n\r\n\r\n\r\n\r\n
                <\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
                706<\/th>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n
                <\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n
                <\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n \t
              3. \r\n\r\n\r\n\r\n\r\n\r\n\r\n
                <\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
                7019<\/span><\/th>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n
                <\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n
                <\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n \t
              4. \r\n\r\n\r\n\r\n\r\n\r\n\r\n
                <\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
                5034<\/span><\/th>\r\n<\/td>\r\n<\/td>\r\n<\/th>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n
                <\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n
                <\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n \t
              5. \r\n\r\n\r\n\r\n\r\n\r\n\r\n
                <\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
                40154<\/span><\/th>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n
                <\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n
                <\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n \t
              6. \r\n\r\n\r\n\r\n\r\n\r\n\r\n
                <\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
                20 428<\/th>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n
                <\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n
                <\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n \t
              7. \r\n\r\n\r\n\r\n\r\n\r\n\r\n
                <\/th>\r\nhundred thousands<\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
                904539<\/span><\/th>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n
                <\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n
                <\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n \t
              8. \r\n\r\n\r\n\r\n\r\n\r\n\r\n
                <\/th>\r\nhundred thousands<\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
                406217<\/span><\/th>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n
                <\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n
                <\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
              9. Find the differences.\r\n
                  \r\n \t
                1. [latex]\\begin{array}[t]{rr}&54\\\\-&5\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                2. [latex]\\begin{array}[t]{rr}&63\\\\-&6\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                3. [latex]\\begin{array}[t]{rr}&82\\\\-&9\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                4. [latex]\\begin{array}[t]{rr}&25\\\\-&17\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                5. [latex]\\begin{array}[t]{rr}&92\\\\-&53\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                6. [latex]\\begin{array}[t]{rr}&58\\\\-&39\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                7. Find the differences.\r\n
                    \r\n \t
                  1. [latex]\\begin{array}[t]{rr}&172\\\\-&16\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                  2. [latex]\\begin{array}[t]{rr}&263\\\\-&59\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                  3. [latex]\\begin{array}[t]{rr}&974\\\\-&65\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                  4. [latex]\\begin{array}[t]{rr}&629\\\\-&349\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                  5. [latex]\\begin{array}[t]{rr}&956\\\\-&392\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                  6. [latex]\\begin{array}[t]{rr}&754\\\\-&636\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                  7. Find the differences. Check your answers using addition.\r\n
                      \r\n \t
                    1. [latex]\\begin{array}[t]{rr}&83\\\\-&15\\\\ \\hline \\\\ \\end{array}[\/latex] check:<\/li>\r\n \t
                    2. [latex]\\begin{array}[t]{rr}&639\\\\-&484\\\\ \\hline \\\\ \\end{array}[\/latex] check:<\/li>\r\n \t
                    3. [latex]\\begin{array}[t]{rr}&1\\, 041\\\\-&436\\\\ \\hline \\\\ \\end{array}[\/latex] check:<\/li>\r\n \t
                    4. [latex]\\begin{array}[t]{rr}&7 \\,317 \\\\-& 5\\, 293\\\\ \\hline \\\\ \\end{array}[\/latex] check:<\/li>\r\n \t
                    5. [latex]\\begin{array}[t]{rr}&45 \\,398\\\\-& 2\\, 737\\\\ \\hline \\\\ \\end{array}[\/latex] check:<\/li>\r\n \t
                    6. [latex]\\begin{array}[t]{rr}&84 \\,902 \\\\-& 24\\, 290\\\\ \\hline \\\\ \\end{array}[\/latex] check:<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                    7. Find the differences.\r\n
                        \r\n \t
                      1. [latex]\\begin{array}[t]{rr}&251\\\\-&84\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                      2. [latex]\\begin{array}[t]{rr}&286\\\\-&98\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                      3. [latex]\\begin{array}[t]{rr}&256\\\\-&79\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                      4. [latex]\\begin{array}[t]{rr}&427\\\\-&328\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                      5. [latex]\\begin{array}[t]{rr}&970\\\\-&476\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                      6. [latex]\\begin{array}[t]{rr}&534\\\\-&296\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                      7. Find the differences.\r\n
                          \r\n \t
                        1. [latex]\\begin{array}[t]{rr}&3\\, 614\\\\-& 923\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                        2. [latex]\\begin{array}[t]{rr}&5 \\,132 \\\\-& 747\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                        3. [latex]\\begin{array}[t]{rr}&1 \\,263 \\\\-& 486\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                        4. [latex]\\begin{array}[t]{rr}&6 \\,163 \\\\-& 2\\, 178\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                        5. [latex]\\begin{array}[t]{rr}&6 \\,311 \\\\-& 3 \\,784\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                        6. [latex]\\begin{array}[t]{rr}&7 \\,234 \\\\-& 2 \\,659\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                        7. [latex]\\begin{array}[t]{rr}&71 \\,236 \\\\-& 7 \\,852\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                        8. [latex]\\begin{array}[t]{rr}&34 \\,529 \\\\-& 4 \\,868\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                        9. [latex]\\begin{array}[t]{rr}&57 \\,389 \\\\-& 3 \\,894\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                        10. [latex]\\begin{array}[t]{rr}&91 \\,821 \\\\-& 76\\, 953\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                        11. [latex]\\begin{array}[t]{rr}&81 \\,153 \\\\-& 43 \\,569\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                        12. [latex]\\begin{array}[t]{rr}&92 \\,763 \\\\-& 34 \\,387\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                        13. Find the differences.\r\n
                            \r\n \t
                          1. [latex]\\begin{array}[t]{rr}&403\\\\-&16\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                          2. [latex]\\begin{array}[t]{rr}&800\\\\-&75\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                          3. [latex]\\begin{array}[t]{rr}&600\\\\-&124\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                          4. [latex]\\begin{array}[t]{rr}&804\\\\-&326\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                          5. [latex]\\begin{array}[t]{rr}&901\\\\-&258\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                          6. [latex]\\begin{array}[t]{rr}&8\\, 035\\\\-& 652\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                          7. [latex]\\begin{array}[t]{rr}&3 \\,600 \\\\-& 1\\, 135\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                          8. [latex]\\begin{array}[t]{rr}&7 \\,065 \\\\-& 6 \\,130\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                          9. [latex]\\begin{array}[t]{rr}&40 \\,862 \\\\-& 3 \\,978\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                          10. [latex]\\begin{array}[t]{rr}&50 \\,126 \\\\-& 9 \\,238\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                          11. [latex]\\begin{array}[t]{rr}&80 \\,965 \\\\-& 67 \\,836\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                          12. [latex]\\begin{array}[t]{rr}&30 \\,642 \\\\-& 19 \\,637\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                          13. Rewrite each question in columns and find the difference.\r\n
                              \r\n \t
                            1. 845 \u2212 659 =<\/li>\r\n \t
                            2. 1920<\/span> \u2212 731 =<\/li>\r\n \t
                            3. 6927<\/span> \u2212 2765<\/span> =<\/li>\r\n \t
                            4. 19053<\/span> \u2212 8954<\/span> =<\/li>\r\n \t
                            5. 73050<\/span> \u2212 \u00a036174<\/span> =<\/li>\r\n \t
                            6. 86295<\/span> \u2212 46049<\/span> =<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                            7. Estimate the differences. Round the numbers before you subtract.\r\n
                                \r\n \t
                              1. [latex]\\begin{array}[t]{rr}&357\\\\-&129\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                              2. [latex]\\begin{array}[t]{rr}&3 546\\\\-& 866\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                              3. [latex]\\begin{array}[t]{rr}&2 765 \\\\-& 249\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                              4. [latex]\\begin{array}[t]{rr}&6 263 \\\\-& 2 118\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                              5. [latex]\\begin{array}[t]{rr}&63 947 \\\\-& 5 689\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n \t
                              6. [latex]\\begin{array}[t]{rr}&47 296 \\\\-& 21 592\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                              7. Use the 5 problem solving steps. Look for key words and patterns to help you choose the correct operation. Estimate the answer using rounded numbers if the numbers have 2 digits or more.\r\n
                                  \r\n \t
                                1. Last Friday, 1259<\/span> students and 339 parents went to the hockey game. How many students and parents were at the game?<\/li>\r\n \t
                                2. The Laerdal Tunnel in Norway is the longest road tunnel in the world. It is 24510<\/span> metres long. The Zhongnanshan Tunnel in China is the second longest road tunnel in the world. It is 18040<\/span> metres long. How much longer is the Laerdal Tunnel?<\/li>\r\n \t
                                3. Li Chiu bought school clothes for her children. She spent $46 at the department store, $40 at the shoe store and $78 at the discount store. How much did Li spend altogether?<\/li>\r\n \t
                                4. A truck weighed 4267<\/span> kilograms when loaded with dirt. When the truck is empty it weighs 2189<\/span> kilograms. How much did the dirt weigh?<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                5. Find the sum or difference for each question.\r\n
                                    \r\n \t
                                  1. 776\u00a0 +\u00a0 634 \u2212 478 =<\/li>\r\n \t
                                  2. 3714<\/span> \u2212 819 + 496 =<\/li>\r\n \t
                                  3. 7413<\/span> \u2212 249\u00a0 + 382 =<\/li>\r\n \t
                                  4. 6415<\/span> + 5829<\/span> \u2212 1756<\/span> =<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                  5. Use the 5 problem solving steps. Look for key words and patterns to help you choose the correct operation. Estimate the answer using rounded numbers if the numbers have 2 digits or more. Show all your work.\r\n
                                      \r\n \t
                                    1. Two weeks ago, Van opened a new bank account and deposited $295. He paid $146 for his gas bill. Van then deposited $1632<\/span> in his account. How much money is in his account?<\/li>\r\n \t
                                    2. Michel has 1532<\/span> metres of fencing. He needs to fence his garden which measures 253 metres long and 187 metres wide. Does he have enough fencing? How much fencing will be left over?<\/li>\r\n<\/ol>\r\n<\/li>\r\n<\/ol>\r\n

                                      Answers to Unit 3 Review<\/h1>\r\n
                                        \r\n \t
                                      1. \r\n
                                          \r\n \t
                                        1. 34<\/li>\r\n \t
                                        2. 34<\/li>\r\n \t
                                        3. 23<\/li>\r\n \t
                                        4. 53<\/li>\r\n \t
                                        5. 24<\/li>\r\n \t
                                        6. 41<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                        7. \r\n
                                            \r\n \t
                                          1. 572<\/li>\r\n \t
                                          2. 671<\/li>\r\n \t
                                          3. 121<\/li>\r\n \t
                                          4. 275<\/li>\r\n \t
                                          5. 36<\/li>\r\n \t
                                          6. 415<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                          7. \r\n
                                              \r\n \t
                                            1. 724<\/li>\r\n \t
                                            2. 4053<\/span><\/li>\r\n \t
                                            3. 4383<\/span><\/li>\r\n \t
                                            4. 2832<\/span><\/li>\r\n \t
                                            5. 61214<\/span><\/li>\r\n \t
                                            6. 51314<\/span><\/li>\r\n \t
                                            7. 30592<\/span><\/li>\r\n \t
                                            8. 70261<\/span><\/li>\r\n \t
                                            9. 16103<\/span><\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                            10. \r\n
                                                \r\n \t
                                              1. 625<\/li>\r\n \t
                                              2. 433<\/li>\r\n \t
                                              3. 2421<\/span><\/li>\r\n \t
                                              4. 6263<\/span><\/li>\r\n \t
                                              5. 55021<\/span><\/li>\r\n \t
                                              6. 51621<\/span><\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                              7. \r\n
                                                  \r\n \t
                                                1. \r\n\r\n\r\n\r\n\r\n\r\n
                                                  <\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
                                                  392<\/th>\r\n<\/td>\r\n<\/td>\r\n3<\/td>\r\n9<\/td>\r\n2<\/td>\r\n<\/tr>\r\n
                                                  <\/td>\r\n<\/td>\r\n<\/td>\r\n3<\/td>\r\n8<\/strong><\/em><\/td>\r\n12<\/strong><\/em><\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n \t
                                                2. \r\n\r\n\r\n\r\n\r\n\r\n
                                                  <\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
                                                  821<\/th>\r\n<\/td>\r\n<\/td>\r\n8<\/td>\r\n2<\/td>\r\n1<\/td>\r\n<\/tr>\r\n
                                                  <\/td>\r\n<\/td>\r\n<\/td>\r\n8<\/td>\r\n1<\/strong><\/em><\/td>\r\n11<\/strong><\/em><\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n \t
                                                3. \r\n\r\n\r\n\r\n\r\n\r\n
                                                  <\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
                                                  6739<\/span><\/th>\r\n<\/td>\r\n6<\/td>\r\n7<\/td>\r\n3<\/td>\r\n9<\/td>\r\n<\/tr>\r\n
                                                  <\/td>\r\n<\/td>\r\n6<\/td>\r\n6<\/strong><\/em><\/td>\r\n13<\/strong><\/em><\/td>\r\n9<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n \t
                                                4. \r\n\r\n\r\n\r\n\r\n\r\n
                                                  <\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
                                                  4528<\/span><\/th>\r\n<\/td>\r\n4<\/td>\r\n5<\/td>\r\n2<\/td>\r\n8<\/td>\r\n<\/tr>\r\n
                                                  <\/td>\r\n<\/td>\r\n4<\/td>\r\n4<\/strong><\/em><\/td>\r\n12<\/strong><\/em><\/td>\r\n8<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n \t
                                                5. \r\n\r\n\r\n\r\n\r\n\r\n
                                                  <\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
                                                  24986<\/span><\/th>\r\n2<\/td>\r\n4<\/td>\r\n9<\/td>\r\n8<\/td>\r\n6<\/td>\r\n<\/tr>\r\n
                                                  <\/td>\r\n2<\/td>\r\n3<\/strong><\/em><\/td>\r\n19<\/strong><\/em><\/td>\r\n8<\/td>\r\n6<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n \t
                                                6. \r\n\r\n\r\n\r\n\r\n\r\n
                                                  <\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
                                                  47182<\/span><\/th>\r\n4<\/td>\r\n7<\/td>\r\n1<\/td>\r\n8<\/td>\r\n2<\/td>\r\n<\/tr>\r\n
                                                  <\/td>\r\n4<\/td>\r\n6<\/strong><\/em><\/td>\r\n11<\/strong><\/em><\/td>\r\n8<\/td>\r\n2<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                7. \r\n
                                                    \r\n \t
                                                  1. \r\n\r\n\r\n\r\n\r\n\r\n\r\n
                                                    <\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
                                                    302<\/th>\r\n<\/td>\r\n<\/td>\r\n3<\/td>\r\n0<\/td>\r\n2<\/td>\r\n<\/tr>\r\n
                                                    <\/td>\r\n<\/td>\r\n<\/td>\r\n2<\/strong><\/em><\/td>\r\n10<\/strong><\/em><\/td>\r\n2<\/td>\r\n<\/tr>\r\n
                                                    <\/td>\r\n<\/td>\r\n<\/td>\r\n2<\/td>\r\n9<\/strong><\/em><\/td>\r\n12<\/strong><\/em><\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n \t
                                                  2. \r\n\r\n\r\n\r\n\r\n\r\n\r\n
                                                    <\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
                                                    706<\/th>\r\n<\/td>\r\n<\/td>\r\n7<\/td>\r\n0<\/td>\r\n6<\/td>\r\n<\/tr>\r\n
                                                    <\/td>\r\n<\/td>\r\n<\/td>\r\n6<\/strong><\/em><\/td>\r\n10<\/strong><\/em><\/td>\r\n16<\/td>\r\n<\/tr>\r\n
                                                    <\/td>\r\n<\/td>\r\n<\/td>\r\n6<\/td>\r\n9<\/strong><\/em><\/td>\r\n16<\/strong><\/em><\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n \t
                                                  3. \r\n\r\n\r\n\r\n\r\n\r\n\r\n
                                                    <\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
                                                    7019<\/span><\/th>\r\n<\/td>\r\n7<\/td>\r\n0<\/td>\r\n1<\/td>\r\n9<\/td>\r\n<\/tr>\r\n
                                                    <\/td>\r\n<\/td>\r\n6<\/strong><\/em><\/td>\r\n10<\/strong><\/em><\/td>\r\n1<\/td>\r\n9<\/td>\r\n<\/tr>\r\n
                                                    <\/td>\r\n<\/td>\r\n6<\/td>\r\n9<\/strong><\/em><\/td>\r\n11<\/strong><\/em><\/td>\r\n9<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n \t
                                                  4. \r\n\r\n\r\n\r\n\r\n\r\n\r\n
                                                    <\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
                                                    5034<\/span><\/th>\r\n<\/td>\r\n5<\/td>\r\n0<\/td>\r\n3<\/td>\r\n4<\/td>\r\n<\/tr>\r\n
                                                    <\/td>\r\n<\/td>\r\n4<\/strong><\/em><\/td>\r\n10<\/strong><\/em><\/td>\r\n3<\/td>\r\n4<\/td>\r\n<\/tr>\r\n
                                                    <\/td>\r\n<\/td>\r\n4<\/td>\r\n9<\/strong><\/em><\/td>\r\n13<\/strong><\/em><\/td>\r\n4<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n \t
                                                  5. \r\n\r\n\r\n\r\n\r\n\r\n\r\n
                                                    <\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
                                                    40154<\/span><\/th>\r\n4<\/td>\r\n0<\/td>\r\n1<\/td>\r\n5<\/td>\r\n4<\/td>\r\n<\/tr>\r\n
                                                    <\/td>\r\n3<\/strong><\/em><\/td>\r\n10<\/strong><\/em><\/td>\r\n1<\/td>\r\n5<\/td>\r\n4<\/td>\r\n<\/tr>\r\n
                                                    <\/td>\r\n3<\/td>\r\n9<\/strong><\/em><\/td>\r\n11<\/strong><\/em><\/td>\r\n5<\/td>\r\n4<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n \t
                                                  6. \r\n\r\n\r\n\r\n\r\n\r\n\r\n
                                                    <\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
                                                    20 428<\/th>\r\n2<\/td>\r\n0<\/td>\r\n4<\/td>\r\n2<\/td>\r\n8<\/td>\r\n<\/tr>\r\n
                                                    <\/td>\r\n1<\/strong><\/em><\/td>\r\n10<\/strong><\/em><\/td>\r\n4<\/td>\r\n2<\/td>\r\n8<\/td>\r\n<\/tr>\r\n
                                                    <\/td>\r\n1<\/td>\r\n9<\/strong><\/em><\/td>\r\n14<\/strong><\/em><\/td>\r\n2<\/td>\r\n8<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n \t
                                                  7. \r\n\r\n\r\n\r\n\r\n\r\n\r\n
                                                    <\/th>\r\nhundred thousands<\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
                                                    904539<\/span><\/th>\r\n9<\/td>\r\n0<\/td>\r\n4<\/td>\r\n5<\/td>\r\n3<\/td>\r\n9<\/td>\r\n<\/tr>\r\n
                                                    <\/td>\r\n8<\/strong><\/em><\/td>\r\n10<\/strong><\/em><\/td>\r\n4<\/td>\r\n5<\/td>\r\n3<\/td>\r\n9<\/td>\r\n<\/tr>\r\n
                                                    <\/td>\r\n8<\/td>\r\n9<\/strong><\/em><\/td>\r\n14<\/strong><\/em><\/td>\r\n5<\/td>\r\n3<\/td>\r\n9<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n \t
                                                  8. \r\n\r\n\r\n\r\n\r\n\r\n\r\n
                                                    <\/th>\r\nhundred thousands<\/th>\r\nten thousands<\/th>\r\nthousands<\/th>\r\nhundreds<\/th>\r\ntens<\/th>\r\nones<\/th>\r\n<\/tr>\r\n
                                                    406217<\/span><\/th>\r\n4<\/td>\r\n0<\/td>\r\n6<\/td>\r\n2<\/td>\r\n1<\/td>\r\n7<\/td>\r\n<\/tr>\r\n
                                                    <\/td>\r\n3<\/strong><\/em><\/td>\r\n10<\/strong><\/em><\/td>\r\n6<\/td>\r\n2<\/td>\r\n1<\/td>\r\n7<\/td>\r\n<\/tr>\r\n
                                                    <\/td>\r\n3<\/td>\r\n9<\/strong><\/em><\/td>\r\n16<\/strong><\/em><\/td>\r\n2<\/td>\r\n1<\/td>\r\n7<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                  9. \r\n
                                                      \r\n \t
                                                    1. 49<\/li>\r\n \t
                                                    2. 57<\/li>\r\n \t
                                                    3. 73<\/li>\r\n \t
                                                    4. 8<\/li>\r\n \t
                                                    5. 39<\/li>\r\n \t
                                                    6. 19<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                    7. \r\n
                                                        \r\n \t
                                                      1. 156<\/li>\r\n \t
                                                      2. 204<\/li>\r\n \t
                                                      3. 909<\/li>\r\n \t
                                                      4. 280<\/li>\r\n \t
                                                      5. 564<\/li>\r\n \t
                                                      6. 118<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                      7. \r\n
                                                          \r\n \t
                                                        1. 68<\/li>\r\n \t
                                                        2. 155<\/li>\r\n \t
                                                        3. 605<\/li>\r\n \t
                                                        4. 2024<\/span><\/li>\r\n \t
                                                        5. 42661<\/span><\/li>\r\n \t
                                                        6. 60612<\/span><\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                        7. \r\n
                                                            \r\n \t
                                                          1. 167<\/li>\r\n \t
                                                          2. 188<\/li>\r\n \t
                                                          3. 177<\/li>\r\n \t
                                                          4. 99<\/li>\r\n \t
                                                          5. 494<\/li>\r\n \t
                                                          6. 238<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                          7. \r\n
                                                              \r\n \t
                                                            1. 2691<\/span><\/li>\r\n \t
                                                            2. 4385<\/span><\/li>\r\n \t
                                                            3. 777<\/li>\r\n \t
                                                            4. 3985<\/span><\/li>\r\n \t
                                                            5. 2527<\/span><\/li>\r\n \t
                                                            6. 4575<\/span><\/li>\r\n \t
                                                            7. 63384<\/span><\/li>\r\n \t
                                                            8. 29661<\/span><\/li>\r\n \t
                                                            9. 53495<\/span><\/li>\r\n \t
                                                            10. 14868<\/span><\/li>\r\n \t
                                                            11. 37584<\/span><\/li>\r\n \t
                                                            12. 58376<\/span><\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                            13. \r\n
                                                                \r\n \t
                                                              1. 387<\/li>\r\n \t
                                                              2. 725<\/li>\r\n \t
                                                              3. 476<\/li>\r\n \t
                                                              4. 478<\/li>\r\n \t
                                                              5. 643<\/li>\r\n \t
                                                              6. 7383<\/span><\/li>\r\n \t
                                                              7. 2465<\/span><\/li>\r\n \t
                                                              8. 935<\/li>\r\n \t
                                                              9. 36884<\/span><\/li>\r\n \t
                                                              10. 40888<\/span><\/li>\r\n \t
                                                              11. 13129<\/span><\/li>\r\n \t
                                                              12. 11005<\/span><\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                              13. \r\n
                                                                  \r\n \t
                                                                1. 186<\/li>\r\n \t
                                                                2. 1189<\/span><\/li>\r\n \t
                                                                3. 4162<\/span><\/li>\r\n \t
                                                                4. 10099<\/span><\/li>\r\n \t
                                                                5. 36876<\/span><\/li>\r\n \t
                                                                6. 40246<\/span><\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                7. \r\n
                                                                    \r\n \t
                                                                  1. 400 \u2212 100 = 300<\/li>\r\n \t
                                                                  2. 3500<\/span> \u2212 900 = 2600<\/span><\/li>\r\n \t
                                                                  3. 2800<\/span> \u2212 200 = 2 600<\/li>\r\n \t
                                                                  4. 6000<\/span> \u2212 2000<\/span> = 4000<\/span><\/li>\r\n \t
                                                                  5. 64000<\/span> \u2212 6000<\/span> = 58000<\/span><\/li>\r\n \t
                                                                  6. 50000<\/span> \u2212 20000<\/span> = 30000<\/span><\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                  7. \r\n
                                                                      \r\n \t
                                                                    1. 1598<\/span> students<\/li>\r\n \t
                                                                    2. 6470<\/span> metres<\/li>\r\n \t
                                                                    3. $164<\/li>\r\n \t
                                                                    4. 2078<\/span> kilograms<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                    5. \r\n
                                                                        \r\n \t
                                                                      1. 932<\/li>\r\n \t
                                                                      2. 3391<\/span><\/li>\r\n \t
                                                                      3. 7546<\/span><\/li>\r\n \t
                                                                      4. 10488<\/span><\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                                                                      5. \r\n
                                                                          \r\n \t
                                                                        1. $1781<\/span><\/li>\r\n \t
                                                                        2. Yes, 652 metres leftover<\/li>\r\n<\/ol>\r\n<\/li>\r\n<\/ol>\r\n
                                                                          \r\n\r\nCONGRATULATIONS!!\r\n\r\nNow you have finished Unit 3.\r\n\r\nTEST TIME!\r\n\r\nAsk your instructor for the Practice Test for this unit.\r\n\r\nOnce you\u2019ve done the practice test, you need to do the unit 3 test.\r\n\r\nAgain, ask your instructor for this.\r\n\r\nGood luck!\r\n\r\n<\/div>","rendered":"

                                                                          You will now practice all of the skills you learned in Unit 3. Check your work using the answer key at the end of the review.<\/p>\n

                                                                            \n
                                                                          1. Find the differences.\n
                                                                              \n
                                                                            1. [latex]\\begin{array}[t]{rr}&58\\\\-&24\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                            2. [latex]\\begin{array}[t]{rr}&99\\\\-&65\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                            3. [latex]\\begin{array}[t]{rr}&98\\\\-&75\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                            4. [latex]\\begin{array}[t]{rr}&87\\\\-&34\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                            5. [latex]\\begin{array}[t]{rr}&45\\\\-&21\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                            6. [latex]\\begin{array}[t]{rr}&76\\\\-&35\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n<\/ol>\n<\/li>\n
                                                                            7. Find the differences.\n
                                                                                \n
                                                                              1. [latex]\\begin{array}[t]{rr}&995\\\\-&423\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                              2. [latex]\\begin{array}[t]{rr}&987\\\\-&316\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                              3. [latex]\\begin{array}[t]{rr}&579\\\\-&458\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                              4. [latex]\\begin{array}[t]{rr}&877\\\\-&602\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                              5. [latex]\\begin{array}[t]{rr}&468\\\\-&432\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                              6. [latex]\\begin{array}[t]{rr}&686\\\\-&271\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n<\/ol>\n<\/li>\n
                                                                              7. Find the differences.\n
                                                                                  \n
                                                                                1. [latex]\\begin{array}[t]{rr}&1\\, 265\\\\-& 541\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                2. [latex]\\begin{array}[t]{rr}&4\\, 587 \\\\-& 534\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                3. [latex]\\begin{array}[t]{rr}&6 \\,889 \\\\-& 2\\, 506\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                4. [latex]\\begin{array}[t]{rr}&7 \\,936 \\\\-& 5 \\,104\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                5. [latex]\\begin{array}[t]{rr}&62\\, 589\\\\-& 1\\, 375\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                6. [latex]\\begin{array}[t]{rr}&54 \\,567 \\\\-& 3 \\,253\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                7. [latex]\\begin{array}[t]{rr}&44 \\,293 \\\\-& 13 \\,701\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                8. [latex]\\begin{array}[t]{rr}&86 \\,477 \\\\-&16 \\,216\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                9. [latex]\\begin{array}[t]{rr}&37 \\,516 \\\\-& 21\\, 413\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n<\/ol>\n<\/li>\n
                                                                                10. Rewrite each question in columns and find the differences.\n
                                                                                    \n
                                                                                  1. 968 \u2212 343 =<\/li>\n
                                                                                  2. 865 \u2212 432 =<\/li>\n
                                                                                  3. 7482<\/span> \u2212\u00a0 5061<\/span> =<\/li>\n
                                                                                  4. 11589<\/span> \u2212 5326<\/span> =<\/li>\n
                                                                                  5. 97383<\/span> \u2212 42362<\/span> =<\/li>\n
                                                                                  6. 109861<\/span> \u2212 58240<\/span> =<\/li>\n<\/ol>\n<\/li>\n
                                                                                  7. Borrow from the number in the shaded box.\n
                                                                                      \n
                                                                                    1. \n\n\n\n\n\n
                                                                                      <\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                      392<\/th>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
                                                                                      <\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n
                                                                                    2. \n\n\n\n\n\n
                                                                                      <\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                      821<\/th>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
                                                                                      <\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n
                                                                                    3. \n\n\n\n\n\n
                                                                                      <\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                      6739<\/span><\/th>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
                                                                                      <\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n
                                                                                    4. \n\n\n\n\n\n
                                                                                      <\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                      4528<\/span><\/th>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
                                                                                      <\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n
                                                                                    5. \n\n\n\n\n\n
                                                                                      <\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                      24986<\/span><\/th>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
                                                                                      <\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n
                                                                                    6. \n\n\n\n\n\n
                                                                                      <\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                      47182<\/span><\/th>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
                                                                                      <\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n<\/ol>\n<\/li>\n
                                                                                    7. Borrow from the number in the shaded box.\n
                                                                                        \n
                                                                                      1. \n\n\n\n\n\n\n
                                                                                        <\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                        302<\/th>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
                                                                                        <\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
                                                                                        <\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n
                                                                                      2. \n\n\n\n\n\n\n
                                                                                        <\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                        706<\/th>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
                                                                                        <\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
                                                                                        <\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n
                                                                                      3. \n\n\n\n\n\n\n
                                                                                        <\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                        7019<\/span><\/th>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
                                                                                        <\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
                                                                                        <\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n
                                                                                      4. \n\n\n\n\n\n\n
                                                                                        <\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                        5034<\/span><\/th>\n<\/td>\n<\/td>\n<\/th>\n<\/td>\n<\/td>\n<\/tr>\n
                                                                                        <\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
                                                                                        <\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n
                                                                                      5. \n\n\n\n\n\n\n
                                                                                        <\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                        40154<\/span><\/th>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
                                                                                        <\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
                                                                                        <\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n
                                                                                      6. \n\n\n\n\n\n\n
                                                                                        <\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                        20 428<\/th>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
                                                                                        <\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
                                                                                        <\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n
                                                                                      7. \n\n\n\n\n\n\n
                                                                                        <\/th>\nhundred thousands<\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                        904539<\/span><\/th>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
                                                                                        <\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
                                                                                        <\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n
                                                                                      8. \n\n\n\n\n\n\n
                                                                                        <\/th>\nhundred thousands<\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                        406217<\/span><\/th>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
                                                                                        <\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
                                                                                        <\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n<\/ol>\n<\/li>\n
                                                                                      9. Find the differences.\n
                                                                                          \n
                                                                                        1. [latex]\\begin{array}[t]{rr}&54\\\\-&5\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                        2. [latex]\\begin{array}[t]{rr}&63\\\\-&6\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                        3. [latex]\\begin{array}[t]{rr}&82\\\\-&9\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                        4. [latex]\\begin{array}[t]{rr}&25\\\\-&17\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                        5. [latex]\\begin{array}[t]{rr}&92\\\\-&53\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                        6. [latex]\\begin{array}[t]{rr}&58\\\\-&39\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n<\/ol>\n<\/li>\n
                                                                                        7. Find the differences.\n
                                                                                            \n
                                                                                          1. [latex]\\begin{array}[t]{rr}&172\\\\-&16\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                          2. [latex]\\begin{array}[t]{rr}&263\\\\-&59\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                          3. [latex]\\begin{array}[t]{rr}&974\\\\-&65\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                          4. [latex]\\begin{array}[t]{rr}&629\\\\-&349\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                          5. [latex]\\begin{array}[t]{rr}&956\\\\-&392\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                          6. [latex]\\begin{array}[t]{rr}&754\\\\-&636\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n<\/ol>\n<\/li>\n
                                                                                          7. Find the differences. Check your answers using addition.\n
                                                                                              \n
                                                                                            1. [latex]\\begin{array}[t]{rr}&83\\\\-&15\\\\ \\hline \\\\ \\end{array}[\/latex] check:<\/li>\n
                                                                                            2. [latex]\\begin{array}[t]{rr}&639\\\\-&484\\\\ \\hline \\\\ \\end{array}[\/latex] check:<\/li>\n
                                                                                            3. [latex]\\begin{array}[t]{rr}&1\\, 041\\\\-&436\\\\ \\hline \\\\ \\end{array}[\/latex] check:<\/li>\n
                                                                                            4. [latex]\\begin{array}[t]{rr}&7 \\,317 \\\\-& 5\\, 293\\\\ \\hline \\\\ \\end{array}[\/latex] check:<\/li>\n
                                                                                            5. [latex]\\begin{array}[t]{rr}&45 \\,398\\\\-& 2\\, 737\\\\ \\hline \\\\ \\end{array}[\/latex] check:<\/li>\n
                                                                                            6. [latex]\\begin{array}[t]{rr}&84 \\,902 \\\\-& 24\\, 290\\\\ \\hline \\\\ \\end{array}[\/latex] check:<\/li>\n<\/ol>\n<\/li>\n
                                                                                            7. Find the differences.\n
                                                                                                \n
                                                                                              1. [latex]\\begin{array}[t]{rr}&251\\\\-&84\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                              2. [latex]\\begin{array}[t]{rr}&286\\\\-&98\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                              3. [latex]\\begin{array}[t]{rr}&256\\\\-&79\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                              4. [latex]\\begin{array}[t]{rr}&427\\\\-&328\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                              5. [latex]\\begin{array}[t]{rr}&970\\\\-&476\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                              6. [latex]\\begin{array}[t]{rr}&534\\\\-&296\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n<\/ol>\n<\/li>\n
                                                                                              7. Find the differences.\n
                                                                                                  \n
                                                                                                1. [latex]\\begin{array}[t]{rr}&3\\, 614\\\\-& 923\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                2. [latex]\\begin{array}[t]{rr}&5 \\,132 \\\\-& 747\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                3. [latex]\\begin{array}[t]{rr}&1 \\,263 \\\\-& 486\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                4. [latex]\\begin{array}[t]{rr}&6 \\,163 \\\\-& 2\\, 178\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                5. [latex]\\begin{array}[t]{rr}&6 \\,311 \\\\-& 3 \\,784\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                6. [latex]\\begin{array}[t]{rr}&7 \\,234 \\\\-& 2 \\,659\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                7. [latex]\\begin{array}[t]{rr}&71 \\,236 \\\\-& 7 \\,852\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                8. [latex]\\begin{array}[t]{rr}&34 \\,529 \\\\-& 4 \\,868\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                9. [latex]\\begin{array}[t]{rr}&57 \\,389 \\\\-& 3 \\,894\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                10. [latex]\\begin{array}[t]{rr}&91 \\,821 \\\\-& 76\\, 953\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                11. [latex]\\begin{array}[t]{rr}&81 \\,153 \\\\-& 43 \\,569\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                12. [latex]\\begin{array}[t]{rr}&92 \\,763 \\\\-& 34 \\,387\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n<\/ol>\n<\/li>\n
                                                                                                13. Find the differences.\n
                                                                                                    \n
                                                                                                  1. [latex]\\begin{array}[t]{rr}&403\\\\-&16\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                  2. [latex]\\begin{array}[t]{rr}&800\\\\-&75\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                  3. [latex]\\begin{array}[t]{rr}&600\\\\-&124\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                  4. [latex]\\begin{array}[t]{rr}&804\\\\-&326\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                  5. [latex]\\begin{array}[t]{rr}&901\\\\-&258\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                  6. [latex]\\begin{array}[t]{rr}&8\\, 035\\\\-& 652\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                  7. [latex]\\begin{array}[t]{rr}&3 \\,600 \\\\-& 1\\, 135\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                  8. [latex]\\begin{array}[t]{rr}&7 \\,065 \\\\-& 6 \\,130\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                  9. [latex]\\begin{array}[t]{rr}&40 \\,862 \\\\-& 3 \\,978\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                  10. [latex]\\begin{array}[t]{rr}&50 \\,126 \\\\-& 9 \\,238\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                  11. [latex]\\begin{array}[t]{rr}&80 \\,965 \\\\-& 67 \\,836\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                  12. [latex]\\begin{array}[t]{rr}&30 \\,642 \\\\-& 19 \\,637\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n<\/ol>\n<\/li>\n
                                                                                                  13. Rewrite each question in columns and find the difference.\n
                                                                                                      \n
                                                                                                    1. 845 \u2212 659 =<\/li>\n
                                                                                                    2. 1920<\/span> \u2212 731 =<\/li>\n
                                                                                                    3. 6927<\/span> \u2212 2765<\/span> =<\/li>\n
                                                                                                    4. 19053<\/span> \u2212 8954<\/span> =<\/li>\n
                                                                                                    5. 73050<\/span> \u2212 \u00a036174<\/span> =<\/li>\n
                                                                                                    6. 86295<\/span> \u2212 46049<\/span> =<\/li>\n<\/ol>\n<\/li>\n
                                                                                                    7. Estimate the differences. Round the numbers before you subtract.\n
                                                                                                        \n
                                                                                                      1. [latex]\\begin{array}[t]{rr}&357\\\\-&129\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                      2. [latex]\\begin{array}[t]{rr}&3 546\\\\-& 866\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                      3. [latex]\\begin{array}[t]{rr}&2 765 \\\\-& 249\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                      4. [latex]\\begin{array}[t]{rr}&6 263 \\\\-& 2 118\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                      5. [latex]\\begin{array}[t]{rr}&63 947 \\\\-& 5 689\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n
                                                                                                      6. [latex]\\begin{array}[t]{rr}&47 296 \\\\-& 21 592\\\\ \\hline \\\\ \\end{array}[\/latex]<\/li>\n<\/ol>\n<\/li>\n
                                                                                                      7. Use the 5 problem solving steps. Look for key words and patterns to help you choose the correct operation. Estimate the answer using rounded numbers if the numbers have 2 digits or more.\n
                                                                                                          \n
                                                                                                        1. Last Friday, 1259<\/span> students and 339 parents went to the hockey game. How many students and parents were at the game?<\/li>\n
                                                                                                        2. The Laerdal Tunnel in Norway is the longest road tunnel in the world. It is 24510<\/span> metres long. The Zhongnanshan Tunnel in China is the second longest road tunnel in the world. It is 18040<\/span> metres long. How much longer is the Laerdal Tunnel?<\/li>\n
                                                                                                        3. Li Chiu bought school clothes for her children. She spent $46 at the department store, $40 at the shoe store and $78 at the discount store. How much did Li spend altogether?<\/li>\n
                                                                                                        4. A truck weighed 4267<\/span> kilograms when loaded with dirt. When the truck is empty it weighs 2189<\/span> kilograms. How much did the dirt weigh?<\/li>\n<\/ol>\n<\/li>\n
                                                                                                        5. Find the sum or difference for each question.\n
                                                                                                            \n
                                                                                                          1. 776\u00a0 +\u00a0 634 \u2212 478 =<\/li>\n
                                                                                                          2. 3714<\/span> \u2212 819 + 496 =<\/li>\n
                                                                                                          3. 7413<\/span> \u2212 249\u00a0 + 382 =<\/li>\n
                                                                                                          4. 6415<\/span> + 5829<\/span> \u2212 1756<\/span> =<\/li>\n<\/ol>\n<\/li>\n
                                                                                                          5. Use the 5 problem solving steps. Look for key words and patterns to help you choose the correct operation. Estimate the answer using rounded numbers if the numbers have 2 digits or more. Show all your work.\n
                                                                                                              \n
                                                                                                            1. Two weeks ago, Van opened a new bank account and deposited $295. He paid $146 for his gas bill. Van then deposited $1632<\/span> in his account. How much money is in his account?<\/li>\n
                                                                                                            2. Michel has 1532<\/span> metres of fencing. He needs to fence his garden which measures 253 metres long and 187 metres wide. Does he have enough fencing? How much fencing will be left over?<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n

                                                                                                              Answers to Unit 3 Review<\/h1>\n
                                                                                                                \n
                                                                                                              1. \n
                                                                                                                  \n
                                                                                                                1. 34<\/li>\n
                                                                                                                2. 34<\/li>\n
                                                                                                                3. 23<\/li>\n
                                                                                                                4. 53<\/li>\n
                                                                                                                5. 24<\/li>\n
                                                                                                                6. 41<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                7. \n
                                                                                                                    \n
                                                                                                                  1. 572<\/li>\n
                                                                                                                  2. 671<\/li>\n
                                                                                                                  3. 121<\/li>\n
                                                                                                                  4. 275<\/li>\n
                                                                                                                  5. 36<\/li>\n
                                                                                                                  6. 415<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                  7. \n
                                                                                                                      \n
                                                                                                                    1. 724<\/li>\n
                                                                                                                    2. 4053<\/span><\/li>\n
                                                                                                                    3. 4383<\/span><\/li>\n
                                                                                                                    4. 2832<\/span><\/li>\n
                                                                                                                    5. 61214<\/span><\/li>\n
                                                                                                                    6. 51314<\/span><\/li>\n
                                                                                                                    7. 30592<\/span><\/li>\n
                                                                                                                    8. 70261<\/span><\/li>\n
                                                                                                                    9. 16103<\/span><\/li>\n<\/ol>\n<\/li>\n
                                                                                                                    10. \n
                                                                                                                        \n
                                                                                                                      1. 625<\/li>\n
                                                                                                                      2. 433<\/li>\n
                                                                                                                      3. 2421<\/span><\/li>\n
                                                                                                                      4. 6263<\/span><\/li>\n
                                                                                                                      5. 55021<\/span><\/li>\n
                                                                                                                      6. 51621<\/span><\/li>\n<\/ol>\n<\/li>\n
                                                                                                                      7. \n
                                                                                                                          \n
                                                                                                                        1. \n\n\n\n\n\n
                                                                                                                          <\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                                                          392<\/th>\n<\/td>\n<\/td>\n3<\/td>\n9<\/td>\n2<\/td>\n<\/tr>\n
                                                                                                                          <\/td>\n<\/td>\n<\/td>\n3<\/td>\n8<\/strong><\/em><\/td>\n12<\/strong><\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n
                                                                                                                        2. \n\n\n\n\n\n
                                                                                                                          <\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                                                          821<\/th>\n<\/td>\n<\/td>\n8<\/td>\n2<\/td>\n1<\/td>\n<\/tr>\n
                                                                                                                          <\/td>\n<\/td>\n<\/td>\n8<\/td>\n1<\/strong><\/em><\/td>\n11<\/strong><\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n
                                                                                                                        3. \n\n\n\n\n\n
                                                                                                                          <\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                                                          6739<\/span><\/th>\n<\/td>\n6<\/td>\n7<\/td>\n3<\/td>\n9<\/td>\n<\/tr>\n
                                                                                                                          <\/td>\n<\/td>\n6<\/td>\n6<\/strong><\/em><\/td>\n13<\/strong><\/em><\/td>\n9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n
                                                                                                                        4. \n\n\n\n\n\n
                                                                                                                          <\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                                                          4528<\/span><\/th>\n<\/td>\n4<\/td>\n5<\/td>\n2<\/td>\n8<\/td>\n<\/tr>\n
                                                                                                                          <\/td>\n<\/td>\n4<\/td>\n4<\/strong><\/em><\/td>\n12<\/strong><\/em><\/td>\n8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n
                                                                                                                        5. \n\n\n\n\n\n
                                                                                                                          <\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                                                          24986<\/span><\/th>\n2<\/td>\n4<\/td>\n9<\/td>\n8<\/td>\n6<\/td>\n<\/tr>\n
                                                                                                                          <\/td>\n2<\/td>\n3<\/strong><\/em><\/td>\n19<\/strong><\/em><\/td>\n8<\/td>\n6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n
                                                                                                                        6. \n\n\n\n\n\n
                                                                                                                          <\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                                                          47182<\/span><\/th>\n4<\/td>\n7<\/td>\n1<\/td>\n8<\/td>\n2<\/td>\n<\/tr>\n
                                                                                                                          <\/td>\n4<\/td>\n6<\/strong><\/em><\/td>\n11<\/strong><\/em><\/td>\n8<\/td>\n2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                        7. \n
                                                                                                                            \n
                                                                                                                          1. \n\n\n\n\n\n\n
                                                                                                                            <\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                                                            302<\/th>\n<\/td>\n<\/td>\n3<\/td>\n0<\/td>\n2<\/td>\n<\/tr>\n
                                                                                                                            <\/td>\n<\/td>\n<\/td>\n2<\/strong><\/em><\/td>\n10<\/strong><\/em><\/td>\n2<\/td>\n<\/tr>\n
                                                                                                                            <\/td>\n<\/td>\n<\/td>\n2<\/td>\n9<\/strong><\/em><\/td>\n12<\/strong><\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n
                                                                                                                          2. \n\n\n\n\n\n\n
                                                                                                                            <\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                                                            706<\/th>\n<\/td>\n<\/td>\n7<\/td>\n0<\/td>\n6<\/td>\n<\/tr>\n
                                                                                                                            <\/td>\n<\/td>\n<\/td>\n6<\/strong><\/em><\/td>\n10<\/strong><\/em><\/td>\n16<\/td>\n<\/tr>\n
                                                                                                                            <\/td>\n<\/td>\n<\/td>\n6<\/td>\n9<\/strong><\/em><\/td>\n16<\/strong><\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n
                                                                                                                          3. \n\n\n\n\n\n\n
                                                                                                                            <\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                                                            7019<\/span><\/th>\n<\/td>\n7<\/td>\n0<\/td>\n1<\/td>\n9<\/td>\n<\/tr>\n
                                                                                                                            <\/td>\n<\/td>\n6<\/strong><\/em><\/td>\n10<\/strong><\/em><\/td>\n1<\/td>\n9<\/td>\n<\/tr>\n
                                                                                                                            <\/td>\n<\/td>\n6<\/td>\n9<\/strong><\/em><\/td>\n11<\/strong><\/em><\/td>\n9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n
                                                                                                                          4. \n\n\n\n\n\n\n
                                                                                                                            <\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                                                            5034<\/span><\/th>\n<\/td>\n5<\/td>\n0<\/td>\n3<\/td>\n4<\/td>\n<\/tr>\n
                                                                                                                            <\/td>\n<\/td>\n4<\/strong><\/em><\/td>\n10<\/strong><\/em><\/td>\n3<\/td>\n4<\/td>\n<\/tr>\n
                                                                                                                            <\/td>\n<\/td>\n4<\/td>\n9<\/strong><\/em><\/td>\n13<\/strong><\/em><\/td>\n4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n
                                                                                                                          5. \n\n\n\n\n\n\n
                                                                                                                            <\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                                                            40154<\/span><\/th>\n4<\/td>\n0<\/td>\n1<\/td>\n5<\/td>\n4<\/td>\n<\/tr>\n
                                                                                                                            <\/td>\n3<\/strong><\/em><\/td>\n10<\/strong><\/em><\/td>\n1<\/td>\n5<\/td>\n4<\/td>\n<\/tr>\n
                                                                                                                            <\/td>\n3<\/td>\n9<\/strong><\/em><\/td>\n11<\/strong><\/em><\/td>\n5<\/td>\n4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n
                                                                                                                          6. \n\n\n\n\n\n\n
                                                                                                                            <\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                                                            20 428<\/th>\n2<\/td>\n0<\/td>\n4<\/td>\n2<\/td>\n8<\/td>\n<\/tr>\n
                                                                                                                            <\/td>\n1<\/strong><\/em><\/td>\n10<\/strong><\/em><\/td>\n4<\/td>\n2<\/td>\n8<\/td>\n<\/tr>\n
                                                                                                                            <\/td>\n1<\/td>\n9<\/strong><\/em><\/td>\n14<\/strong><\/em><\/td>\n2<\/td>\n8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n
                                                                                                                          7. \n\n\n\n\n\n\n
                                                                                                                            <\/th>\nhundred thousands<\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                                                            904539<\/span><\/th>\n9<\/td>\n0<\/td>\n4<\/td>\n5<\/td>\n3<\/td>\n9<\/td>\n<\/tr>\n
                                                                                                                            <\/td>\n8<\/strong><\/em><\/td>\n10<\/strong><\/em><\/td>\n4<\/td>\n5<\/td>\n3<\/td>\n9<\/td>\n<\/tr>\n
                                                                                                                            <\/td>\n8<\/td>\n9<\/strong><\/em><\/td>\n14<\/strong><\/em><\/td>\n5<\/td>\n3<\/td>\n9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n
                                                                                                                          8. \n\n\n\n\n\n\n
                                                                                                                            <\/th>\nhundred thousands<\/th>\nten thousands<\/th>\nthousands<\/th>\nhundreds<\/th>\ntens<\/th>\nones<\/th>\n<\/tr>\n
                                                                                                                            406217<\/span><\/th>\n4<\/td>\n0<\/td>\n6<\/td>\n2<\/td>\n1<\/td>\n7<\/td>\n<\/tr>\n
                                                                                                                            <\/td>\n3<\/strong><\/em><\/td>\n10<\/strong><\/em><\/td>\n6<\/td>\n2<\/td>\n1<\/td>\n7<\/td>\n<\/tr>\n
                                                                                                                            <\/td>\n3<\/td>\n9<\/strong><\/em><\/td>\n16<\/strong><\/em><\/td>\n2<\/td>\n1<\/td>\n7<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                          9. \n
                                                                                                                              \n
                                                                                                                            1. 49<\/li>\n
                                                                                                                            2. 57<\/li>\n
                                                                                                                            3. 73<\/li>\n
                                                                                                                            4. 8<\/li>\n
                                                                                                                            5. 39<\/li>\n
                                                                                                                            6. 19<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                            7. \n
                                                                                                                                \n
                                                                                                                              1. 156<\/li>\n
                                                                                                                              2. 204<\/li>\n
                                                                                                                              3. 909<\/li>\n
                                                                                                                              4. 280<\/li>\n
                                                                                                                              5. 564<\/li>\n
                                                                                                                              6. 118<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                              7. \n
                                                                                                                                  \n
                                                                                                                                1. 68<\/li>\n
                                                                                                                                2. 155<\/li>\n
                                                                                                                                3. 605<\/li>\n
                                                                                                                                4. 2024<\/span><\/li>\n
                                                                                                                                5. 42661<\/span><\/li>\n
                                                                                                                                6. 60612<\/span><\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                7. \n
                                                                                                                                    \n
                                                                                                                                  1. 167<\/li>\n
                                                                                                                                  2. 188<\/li>\n
                                                                                                                                  3. 177<\/li>\n
                                                                                                                                  4. 99<\/li>\n
                                                                                                                                  5. 494<\/li>\n
                                                                                                                                  6. 238<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                  7. \n
                                                                                                                                      \n
                                                                                                                                    1. 2691<\/span><\/li>\n
                                                                                                                                    2. 4385<\/span><\/li>\n
                                                                                                                                    3. 777<\/li>\n
                                                                                                                                    4. 3985<\/span><\/li>\n
                                                                                                                                    5. 2527<\/span><\/li>\n
                                                                                                                                    6. 4575<\/span><\/li>\n
                                                                                                                                    7. 63384<\/span><\/li>\n
                                                                                                                                    8. 29661<\/span><\/li>\n
                                                                                                                                    9. 53495<\/span><\/li>\n
                                                                                                                                    10. 14868<\/span><\/li>\n
                                                                                                                                    11. 37584<\/span><\/li>\n
                                                                                                                                    12. 58376<\/span><\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                    13. \n
                                                                                                                                        \n
                                                                                                                                      1. 387<\/li>\n
                                                                                                                                      2. 725<\/li>\n
                                                                                                                                      3. 476<\/li>\n
                                                                                                                                      4. 478<\/li>\n
                                                                                                                                      5. 643<\/li>\n
                                                                                                                                      6. 7383<\/span><\/li>\n
                                                                                                                                      7. 2465<\/span><\/li>\n
                                                                                                                                      8. 935<\/li>\n
                                                                                                                                      9. 36884<\/span><\/li>\n
                                                                                                                                      10. 40888<\/span><\/li>\n
                                                                                                                                      11. 13129<\/span><\/li>\n
                                                                                                                                      12. 11005<\/span><\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                      13. \n
                                                                                                                                          \n
                                                                                                                                        1. 186<\/li>\n
                                                                                                                                        2. 1189<\/span><\/li>\n
                                                                                                                                        3. 4162<\/span><\/li>\n
                                                                                                                                        4. 10099<\/span><\/li>\n
                                                                                                                                        5. 36876<\/span><\/li>\n
                                                                                                                                        6. 40246<\/span><\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                        7. \n
                                                                                                                                            \n
                                                                                                                                          1. 400 \u2212 100 = 300<\/li>\n
                                                                                                                                          2. 3500<\/span> \u2212 900 = 2600<\/span><\/li>\n
                                                                                                                                          3. 2800<\/span> \u2212 200 = 2 600<\/li>\n
                                                                                                                                          4. 6000<\/span> \u2212 2000<\/span> = 4000<\/span><\/li>\n
                                                                                                                                          5. 64000<\/span> \u2212 6000<\/span> = 58000<\/span><\/li>\n
                                                                                                                                          6. 50000<\/span> \u2212 20000<\/span> = 30000<\/span><\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                          7. \n
                                                                                                                                              \n
                                                                                                                                            1. 1598<\/span> students<\/li>\n
                                                                                                                                            2. 6470<\/span> metres<\/li>\n
                                                                                                                                            3. $164<\/li>\n
                                                                                                                                            4. 2078<\/span> kilograms<\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                            5. \n
                                                                                                                                                \n
                                                                                                                                              1. 932<\/li>\n
                                                                                                                                              2. 3391<\/span><\/li>\n
                                                                                                                                              3. 7546<\/span><\/li>\n
                                                                                                                                              4. 10488<\/span><\/li>\n<\/ol>\n<\/li>\n
                                                                                                                                              5. \n
                                                                                                                                                  \n
                                                                                                                                                1. $1781<\/span><\/li>\n
                                                                                                                                                2. Yes, 652 metres leftover<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n
                                                                                                                                                  \n

                                                                                                                                                  CONGRATULATIONS!!<\/p>\n

                                                                                                                                                  Now you have finished Unit 3.<\/p>\n

                                                                                                                                                  TEST TIME!<\/p>\n

                                                                                                                                                  Ask your instructor for the Practice Test for this unit.<\/p>\n

                                                                                                                                                  Once you\u2019ve done the practice test, you need to do the unit 3 test.<\/p>\n

                                                                                                                                                  Again, ask your instructor for this.<\/p>\n

                                                                                                                                                  Good luck!<\/p>\n<\/div>\n","protected":false},"author":90,"menu_order":7,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-73","chapter","type-chapter","status-publish","hentry"],"part":59,"_links":{"self":[{"href":"https:\/\/opentextbc.ca\/alfm2\/wp-json\/pressbooks\/v2\/chapters\/73","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/opentextbc.ca\/alfm2\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/opentextbc.ca\/alfm2\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/opentextbc.ca\/alfm2\/wp-json\/wp\/v2\/users\/90"}],"version-history":[{"count":14,"href":"https:\/\/opentextbc.ca\/alfm2\/wp-json\/pressbooks\/v2\/chapters\/73\/revisions"}],"predecessor-version":[{"id":791,"href":"https:\/\/opentextbc.ca\/alfm2\/wp-json\/pressbooks\/v2\/chapters\/73\/revisions\/791"}],"part":[{"href":"https:\/\/opentextbc.ca\/alfm2\/wp-json\/pressbooks\/v2\/parts\/59"}],"metadata":[{"href":"https:\/\/opentextbc.ca\/alfm2\/wp-json\/pressbooks\/v2\/chapters\/73\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/opentextbc.ca\/alfm2\/wp-json\/wp\/v2\/media?parent=73"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/opentextbc.ca\/alfm2\/wp-json\/pressbooks\/v2\/chapter-type?post=73"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/opentextbc.ca\/alfm2\/wp-json\/wp\/v2\/contributor?post=73"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/opentextbc.ca\/alfm2\/wp-json\/wp\/v2\/license?post=73"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}