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Reteach and Skills Practice Workbook

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5–3<br />

Name<br />

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

Multiply <strong>and</strong> Divide Facts Through 5<br />

You can double a fact you know to multiply by 4.<br />

Double a fact you already know to<br />

multiply by 4.<br />

4 × 5 = (2 × 5) + (2 × 5)<br />

↓ ↓<br />

10 + 10 = 20<br />

••••• •••••<br />

+ =<br />

•••••<br />

••••• • • • • •<br />

Date<br />

4NS3.0<br />

Double a fact you already know to<br />

multiply by 4.<br />

4 × 7 = (2 × 7) + (2 × 7)<br />

↓ ↓<br />

14 + 14 = 28<br />

••••••• •••••••<br />

••••••• + ••••••• =<br />

• • • • • • •<br />

Chapter Resources<br />

Find 32 ÷ 4. Think: How many groups of 4 are in 32?<br />

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

4 × ? = 32 → 4 × 8 = 32<br />

There are 8 groups of 4 in 32. So, 32 ÷ 4 = 8.<br />

Double a known fact to find the answer.<br />

You can use counters to help you.<br />

1. 6 × 4 = (6 × 2) + (6 × ) = + =<br />

2. 4 × 7 = (2 × ) + (2 × ) = + =<br />

3. 9 × 4 = (9 × ) + (9 × ) = + =<br />

4. 8 × 4 = (8 × ) + (8 × ) = + =<br />

Divide. Draw models if you wish.<br />

5. 12 ÷ 2 = 7. 20 ÷ 5 = 9. 24 ÷ 3 =<br />

6. 21 ÷ 3 = 8. 14 ÷ 2 = 10. 16 ÷ 2 =<br />

Grade 4 77 Chapter 5

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