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Reteach and Skills Practice Workbook

Reteach and Skills Practice Workbook

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2–2<br />

Name<br />

<strong>Reteach</strong><br />

Estimate Sums <strong>and</strong> Differences<br />

Date<br />

An estimate is an answer close to the exact answer. When estimating,<br />

you can round to the nearest ten, hundred, or thous<strong>and</strong>.<br />

Estimate 56 + 82 to<br />

the nearest ten.<br />

Estimate 1,762 - 619 to<br />

the nearest hundred.<br />

4NS2.1<br />

Estimate 12,049 + 8,967<br />

to the nearest thous<strong>and</strong>.<br />

Chapter Resources<br />

56 60<br />

+ 82 + 80<br />

140<br />

So, 56 + 82 is about<br />

140.<br />

1,762 1,800<br />

- 619 - 600<br />

1,200<br />

So, 1,762 - 619 is<br />

about 1,200.<br />

12,049 12,000<br />

+ 8,967 + 9,000<br />

21,000<br />

So, 12,049 + 8,967 is<br />

about 21,000.<br />

Estimate. Round to the nearest ten.<br />

1. 34 + 59<br />

2. 165 + 426<br />

3. 471 - 234<br />

Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.<br />

4. 917 - 123<br />

Estimate. Round to the nearest hundred.<br />

5. 437 + 553<br />

6. 3,721 + 232<br />

7. 682 - 364<br />

8. 7,246 - 2,155<br />

Estimate. Round to the nearest thous<strong>and</strong>.<br />

9. 4,328 + 3,156<br />

10. 6,520 + 2,189<br />

11. 3,281 - 1,468<br />

12. 14,562 – 3,471<br />

Grade 4 21 Chapter 2

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