Unit 1: Number Sense
Unit 1 Review: Number Sense
You will now practice all the skills you learned in Unit 1. Check your work using the answer key at the end of the review.
- Write the place value names (ones, tens, hundreds, thousands, ten thousands, hundred thousands, millions) for each bolded digit.
- 4392
- 765
- 18293
- 56428
- 3641758
- 426153
- 8429576
- 4258
- Using the number 349285106, write the digit that is in each of the following place values.
- millions
- ones
- ten thousands
- thousands
- hundreds
- hundreds thousands
- tens
- Underline the digit for the place value named.
- hundreds, 5321
- tens, 8703
- ten thousands, 34891
- hundred thousands, 891402
- thousands, 72491
- millions, 4201856
- Write the word names for the numbers.
- 818
- 1678
- 29764
- 1984152
- 42803
- 226917
- Write the numerals for these word names.
- twenty-five thousand one hundred thirty-two
- one thousand two hundred seven
- two hundred fifteen thousand twenty-four
- one million six hundred ninety-five thousand four hundred twenty
- seven hundred twenty-six
- nine thousand four
- Write each number in expanded form.
- 184
- 3908
- 61281
- 1539587
- 366524
- Write each number from expanded form.
- 50000 + 6000 + 600 + 90 + 8
- 200000 + 70000 + 8000 + 200 + 60 + 1
- 3000 + 800 + 80 + 5
- 1000000 + 400000 + 70000 + 6000 + 100 + 50 + 3
- 700 + 1
- Arrange these numbers in order from smallest to largest.
- 18; 34937; 727; 1487; 147832
- 769; 6790; 697; 76976; 76796
- Write <, >, or = in each blank as needed.
- 9698 6899
- 7542 7452
- 34682 39421
- 124693 124693
- 738423 783423
- 45832 54123
- Round each number to the nearest hundred.
- 774
- 2581
- 21204
- 692
- 572098
- 7652931
- Round each number to the nearest thousand.
- 948
- 75767
- 288869
- 479
- 3976
- 5012
- Round each number to the nearest ten thousand.
- 4028
- 226917
- 126804
- 9794487
- 87805
- 5912
- Round each number to the nearest hundred thousand.
- 687029
- 1326876
- 523715
- 4766883
- 8182390
- 792013
- Round each number to the nearest million.
- 1009627
- 28101052
- 894063
- 9778656
- 80379591
- 3102975
- Word Problems.
- The three heaviest sharks are the whale shark weighing 30500 kilograms. The basking shark weighing 9258 kilograms. The great white shark weighing 3507 kilograms. Round each number to the nearest thousand.
Shark Number Rounded Number Whale shark Basking shark Great White Shark - Three of the largest islands in the world are New Guinea covering 785753 square kilometers, Baffin Island covering 503944 square kilometers and Honshu Island covering 227413 square kilometers. Round each number to the nearest ten thousand.
Island Number Rounded Number New Guinea Baffin Island Honshu Island
- The three heaviest sharks are the whale shark weighing 30500 kilograms. The basking shark weighing 9258 kilograms. The great white shark weighing 3507 kilograms. Round each number to the nearest thousand.
Answers to Unit 1 Review – Number Sense
-
- tens
- ones
- thousands
- hundreds
- hundred thousands
- ten thousands
- millions
- thousands
-
- 9
- 6
- 8
- 5
- 1
- 2
- 0
-
- 5321
- 8703
- 34891
- 891402
- 72491
- 4201856
-
- eight hundred eighteen
- one thousand six hundred seventy-eight
- twenty-nine thousand seven hundred sixty-four
- one million nine hundred eighty-four thousand one hundred fifty-two
- forty-two thousand eight hundred three
- two hundred twenty-six thousand nine hundred seventeen
-
- 25132
- 1207
- 215024
- 1695420
- 726
- 9004
-
- 100 + 80 + 4
- 3000 + 900 + 8
- 60000 + 1000 + 200 + 80 + 1
- 1000000 + 500000 + 30000 +
9000 + 500 + 80 + 7 - 300 000 + 60 000 + 6 000 + 500 + 20 + 4
-
- 56698
- 278261
- 3885
- 1476153
- 701
-
- 18, 727, 1487, 34937, 147832
- 697, 769, 6790, 76796, 76976
-
- >
- >
- <
- =
- <
- <
-
- 800
- 2600
- 21200
- 700
- 572100
- 7652900
-
- 1000
- 76000
- 289000
- 0
- 4000
- 5000
-
- 0
- 230000
- 130000
- 9790000
- 90000
- 10000
-
- 700000
- 1300000
- 500000
- 4800000
- 8200000
- 800000
-
- 1000000
- 28000000
- 1000000
- 10000000
- 80000000
- 3000000
-
-
Shark Number Rounded Number Whale shark 30500 31000 Basking shark 9258 9000 Great White Shark 3507 4000 -
Kilometers Number Rounded Number New Guinea 785753 790000 Baffin Island 503944 500000 Honshu Island 227413 230000
-
CONGRATULATIONS!!
Now you have finished Unit 1.
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 1 test.
Again, ask your instructor for this.
Good luck!