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Reteach and Skills Practice Workbook

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7–3<br />

Name<br />

Date<br />

To estimate products, round numbers. Then use basic facts <strong>and</strong> multiply.<br />

Look at the number lines below.<br />

Ones<br />

Tens<br />

Hundreds<br />

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

Use Rounding to Estimate Products<br />

0 1 2 3<br />

10 20 30 40<br />

4 5 6 7 8 9 10<br />

50 60 70 80 90 100<br />

100 200 300 400 500 600 700 800 900 1,000<br />

4NS3.0, 4NS1.3<br />

Remember to round<br />

the greater factor to<br />

its greatest place.<br />

Chapter Resources<br />

When a number is halfway between two numbers, round up.<br />

1. 59 × 5<br />

Round the greater<br />

factor to its<br />

greatest place.<br />

Use basic facts <strong>and</strong><br />

multiply.<br />

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

2. 579 × 4<br />

3. 788 × 3<br />

4. 6,222 × 6<br />

5. 8,951 × 4<br />

6. 42 × 7<br />

7. 6,450 × 8<br />

8. 683 × 4<br />

9. 7,395 × 3<br />

Grade 4 121 Chapter 7

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