Unit 3: Subtraction

# Unit 3 Review: Subtraction

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.

1. Find the differences.
1. $\begin{array}[t]{rr}&58\\-&24\\ \hline \\ \end{array}$
2. $\begin{array}[t]{rr}&99\\-&65\\ \hline \\ \end{array}$
3. $\begin{array}[t]{rr}&98\\-&75\\ \hline \\ \end{array}$
4. $\begin{array}[t]{rr}&87\\-&34\\ \hline \\ \end{array}$
5. $\begin{array}[t]{rr}&45\\-&21\\ \hline \\ \end{array}$
6. $\begin{array}[t]{rr}&76\\-&35\\ \hline \\ \end{array}$
2. Find the differences.
1. $\begin{array}[t]{rr}&995\\-&423\\ \hline \\ \end{array}$
2. $\begin{array}[t]{rr}&987\\-&316\\ \hline \\ \end{array}$
3. $\begin{array}[t]{rr}&579\\-&458\\ \hline \\ \end{array}$
4. $\begin{array}[t]{rr}&877\\-&602\\ \hline \\ \end{array}$
5. $\begin{array}[t]{rr}&468\\-&432\\ \hline \\ \end{array}$
6. $\begin{array}[t]{rr}&686\\-&271\\ \hline \\ \end{array}$
3. Find the differences.
1. $\begin{array}[t]{rr}&1\, 265\\-& 541\\ \hline \\ \end{array}$
2. $\begin{array}[t]{rr}&4\, 587 \\-& 534\\ \hline \\ \end{array}$
3. $\begin{array}[t]{rr}&6 \,889 \\-& 2\, 506\\ \hline \\ \end{array}$
4. $\begin{array}[t]{rr}&7 \,936 \\-& 5 \,104\\ \hline \\ \end{array}$
5. $\begin{array}[t]{rr}&62\, 589\\-& 1\, 375\\ \hline \\ \end{array}$
6. $\begin{array}[t]{rr}&54 \,567 \\-& 3 \,253\\ \hline \\ \end{array}$
7. $\begin{array}[t]{rr}&44 \,293 \\-& 13 \,701\\ \hline \\ \end{array}$
8. $\begin{array}[t]{rr}&86 \,477 \\-&16 \,216\\ \hline \\ \end{array}$
9. $\begin{array}[t]{rr}&37 \,516 \\-& 21\, 413\\ \hline \\ \end{array}$
4. Rewrite each question in columns and find the differences.
1. 968 − 343 =
2. 865 − 432 =
3. 7482 −  5061 =
4. 11589 − 5326 =
5. 97383 − 42362 =
6. 109861 − 58240 =
5. Borrow from the number in the shaded box.
1. ten thousands thousands hundreds tens ones
392
2. ten thousands thousands hundreds tens ones
821
3. ten thousands thousands hundreds tens ones
6739
4. ten thousands thousands hundreds tens ones
4528
5. ten thousands thousands hundreds tens ones
24986
6. ten thousands thousands hundreds tens ones
47182
6. Borrow from the number in the shaded box.
1. ten thousands thousands hundreds tens ones
302
2. ten thousands thousands hundreds tens ones
706
3. ten thousands thousands hundreds tens ones
7019
4. ten thousands thousands hundreds tens ones
5034
5. ten thousands thousands hundreds tens ones
40154
6. ten thousands thousands hundreds tens ones
20 428
7. hundred thousands ten thousands thousands hundreds tens ones
904539
8. hundred thousands ten thousands thousands hundreds tens ones
406217
7. Find the differences.
1. $\begin{array}[t]{rr}&54\\-&5\\ \hline \\ \end{array}$
2. $\begin{array}[t]{rr}&63\\-&6\\ \hline \\ \end{array}$
3. $\begin{array}[t]{rr}&82\\-&9\\ \hline \\ \end{array}$
4. $\begin{array}[t]{rr}&25\\-&17\\ \hline \\ \end{array}$
5. $\begin{array}[t]{rr}&92\\-&53\\ \hline \\ \end{array}$
6. $\begin{array}[t]{rr}&58\\-&39\\ \hline \\ \end{array}$
8. Find the differences.
1. $\begin{array}[t]{rr}&172\\-&16\\ \hline \\ \end{array}$
2. $\begin{array}[t]{rr}&263\\-&59\\ \hline \\ \end{array}$
3. $\begin{array}[t]{rr}&974\\-&65\\ \hline \\ \end{array}$
4. $\begin{array}[t]{rr}&629\\-&349\\ \hline \\ \end{array}$
5. $\begin{array}[t]{rr}&956\\-&392\\ \hline \\ \end{array}$
6. $\begin{array}[t]{rr}&754\\-&636\\ \hline \\ \end{array}$
9. Find the differences. Check your answers using addition.
1. $\begin{array}[t]{rr}&83\\-&15\\ \hline \\ \end{array}$ check:
2. $\begin{array}[t]{rr}&639\\-&484\\ \hline \\ \end{array}$ check:
3. $\begin{array}[t]{rr}&1\, 041\\-&436\\ \hline \\ \end{array}$ check:
4. $\begin{array}[t]{rr}&7 \,317 \\-& 5\, 293\\ \hline \\ \end{array}$ check:
5. $\begin{array}[t]{rr}&45 \,398\\-& 2\, 737\\ \hline \\ \end{array}$ check:
6. $\begin{array}[t]{rr}&84 \,902 \\-& 24\, 290\\ \hline \\ \end{array}$ check:
10. Find the differences.
1. $\begin{array}[t]{rr}&251\\-&84\\ \hline \\ \end{array}$
2. $\begin{array}[t]{rr}&286\\-&98\\ \hline \\ \end{array}$
3. $\begin{array}[t]{rr}&256\\-&79\\ \hline \\ \end{array}$
4. $\begin{array}[t]{rr}&427\\-&328\\ \hline \\ \end{array}$
5. $\begin{array}[t]{rr}&970\\-&476\\ \hline \\ \end{array}$
6. $\begin{array}[t]{rr}&534\\-&296\\ \hline \\ \end{array}$
11. Find the differences.
1. $\begin{array}[t]{rr}&3\, 614\\-& 923\\ \hline \\ \end{array}$
2. $\begin{array}[t]{rr}&5 \,132 \\-& 747\\ \hline \\ \end{array}$
3. $\begin{array}[t]{rr}&1 \,263 \\-& 486\\ \hline \\ \end{array}$
4. $\begin{array}[t]{rr}&6 \,163 \\-& 2\, 178\\ \hline \\ \end{array}$
5. $\begin{array}[t]{rr}&6 \,311 \\-& 3 \,784\\ \hline \\ \end{array}$
6. $\begin{array}[t]{rr}&7 \,234 \\-& 2 \,659\\ \hline \\ \end{array}$
7. $\begin{array}[t]{rr}&71 \,236 \\-& 7 \,852\\ \hline \\ \end{array}$
8. $\begin{array}[t]{rr}&34 \,529 \\-& 4 \,868\\ \hline \\ \end{array}$
9. $\begin{array}[t]{rr}&57 \,389 \\-& 3 \,894\\ \hline \\ \end{array}$
10. $\begin{array}[t]{rr}&91 \,821 \\-& 76\, 953\\ \hline \\ \end{array}$
11. $\begin{array}[t]{rr}&81 \,153 \\-& 43 \,569\\ \hline \\ \end{array}$
12. $\begin{array}[t]{rr}&92 \,763 \\-& 34 \,387\\ \hline \\ \end{array}$
12. Find the differences.
1. $\begin{array}[t]{rr}&403\\-&16\\ \hline \\ \end{array}$
2. $\begin{array}[t]{rr}&800\\-&75\\ \hline \\ \end{array}$
3. $\begin{array}[t]{rr}&600\\-&124\\ \hline \\ \end{array}$
4. $\begin{array}[t]{rr}&804\\-&326\\ \hline \\ \end{array}$
5. $\begin{array}[t]{rr}&901\\-&258\\ \hline \\ \end{array}$
6. $\begin{array}[t]{rr}&8\, 035\\-& 652\\ \hline \\ \end{array}$
7. $\begin{array}[t]{rr}&3 \,600 \\-& 1\, 135\\ \hline \\ \end{array}$
8. $\begin{array}[t]{rr}&7 \,065 \\-& 6 \,130\\ \hline \\ \end{array}$
9. $\begin{array}[t]{rr}&40 \,862 \\-& 3 \,978\\ \hline \\ \end{array}$
10. $\begin{array}[t]{rr}&50 \,126 \\-& 9 \,238\\ \hline \\ \end{array}$
11. $\begin{array}[t]{rr}&80 \,965 \\-& 67 \,836\\ \hline \\ \end{array}$
12. $\begin{array}[t]{rr}&30 \,642 \\-& 19 \,637\\ \hline \\ \end{array}$
13. Rewrite each question in columns and find the difference.
1. 845 − 659 =
2. 1920 − 731 =
3. 6927 − 2765 =
4. 19053 − 8954 =
5. 73050 −  36174 =
6. 86295 − 46049 =
14. Estimate the differences. Round the numbers before you subtract.
1. $\begin{array}[t]{rr}&357\\-&129\\ \hline \\ \end{array}$
2. $\begin{array}[t]{rr}&3 546\\-& 866\\ \hline \\ \end{array}$
3. $\begin{array}[t]{rr}&2 765 \\-& 249\\ \hline \\ \end{array}$
4. $\begin{array}[t]{rr}&6 263 \\-& 2 118\\ \hline \\ \end{array}$
5. $\begin{array}[t]{rr}&63 947 \\-& 5 689\\ \hline \\ \end{array}$
6. $\begin{array}[t]{rr}&47 296 \\-& 21 592\\ \hline \\ \end{array}$
15. 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.
1. Last Friday, 1259 students and 339 parents went to the hockey game. How many students and parents were at the game?
2. The Laerdal Tunnel in Norway is the longest road tunnel in the world. It is 24510 metres long. The Zhongnanshan Tunnel in China is the second longest road tunnel in the world. It is 18040 metres long. How much longer is the Laerdal Tunnel?
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? 4. A truck weighed 4267 kilograms when loaded with dirt. When the truck is empty it weighs 2189 kilograms. How much did the dirt weigh? 16. Find the sum or difference for each question. 1. 776 + 634 − 478 = 2. 3714 − 819 + 496 = 3. 7413 − 249 + 382 = 4. 6415 + 5829 − 1756 = 17. 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. 1. Two weeks ago, Van opened a new bank account and deposited$295. He paid $146 for his gas bill. Van then deposited$1632 in his account. How much money is in his account?
2. Michel has 1532 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?

# Answers to Unit 3 Review

1. 34
2. 34
3. 23
4. 53
5. 24
6. 41
1. 572
2. 671
3. 121
4. 275
5. 36
6. 415
1. 724
2. 4053
3. 4383
4. 2832
5. 61214
6. 51314
7. 31192
8. 70261
9. 16103
1. 625
2. 433
3. 2421
4. 6263
5. 55021
6. 51621
1. ten thousands thousands hundreds tens ones
392 3 9 2
3 8 12
2. ten thousands thousands hundreds tens ones
821 8 2 1
8 1 11
3. ten thousands thousands hundreds tens ones
6739 6 7 3 9
6 6 13 9
4. ten thousands thousands hundreds tens ones
4528 4 5 2 8
4 4 12 8
5. ten thousands thousands hundreds tens ones
24986 2 4 9 8 6
2 3 19 8 6
6. ten thousands thousands hundreds tens ones
47182 4 7 1 8 2
4 6 11 8 2
1. ten thousands thousands hundreds tens ones
302 3 0 2
2 10 2
2 9 12
2. ten thousands thousands hundreds tens ones
706 7 0 6
6 10 16
6 9 16
3. ten thousands thousands hundreds tens ones
7019 7 0 1 9
6 10 1 9
6 9 11 9
4. ten thousands thousands hundreds tens ones
5034 5 0 3 4
4 10 3 4
4 9 13 4
5. ten thousands thousands hundreds tens ones
40154 4 0 1 5 4
3 10 1 5 4
3 9 11 5 4
6. ten thousands thousands hundreds tens ones
20 428 2 0 4 2 8
1 10 4 2 8
1 9 14 2 8
7. hundred thousands ten thousands thousands hundreds tens ones
904539 9 0 4 5 3 9
8 10 4 5 3 9
8 9 14 5 3 9
8. hundred thousands ten thousands thousands hundreds tens ones
406217 4 0 6 2 1 7
3 10 6 2 1 7
3 9 16 2 1 7
1. 49
2. 57
3. 73
4. 8
5. 39
6. 19
1. 156
2. 204
3. 909
4. 280
5. 564
6. 118
1. 68
2. 155
3. 605
4. 2024
5. 42661
6. 60612
1. 167
2. 188
3. 177
4. 99
5. 494
6. 265
1. 2691
2. 4385
3. 777
4. 3985
5. 2527
6. 4575
7. 63384
8. 29661
9. 53495
10. 14868
11. 37584
12. 56476
1. 387
2. 725
3. 476
4. 478
5. 643
6. 7383
7. 2465
8. 935
9. 36884
10. 40888
11. 13129
12. 11005
1. 186
2. 1189
3. 4162
4. 10099
5. 36876
6. 40246
1. 400 − 100 = 300
2. 3500 − 900 = 2600
3. 2800 − 200 = 2 600
4. 6000 − 2000 = 4000
5. 64000 − 6000 = 58000
6. 50000</span< − 20000 = 30000
1. 1598 students
2. 6470 metres
3. $164 4. 2078 kilograms 1. 932 2. 3391 3. 7546 4. 10488 1.$1781
2. Yes, 652 metres leftover

CONGRATULATIONS!!

Now you have finished Unit 3.

TEST TIME!

Ask your instructor for the Practice Test for this unit.

Once you’ve done the practice test, you need to do the unit 3 test.

Again, ask your instructor for this.

Good luck!

## License

Adult Literacy Fundamental Mathematics: Book 2 – 2nd Edition Copyright © 2022 by Wendy Tagami and Liz Girard is licensed under a Creative Commons Attribution 4.0 International License, except where otherwise noted.