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Reteach and Skills Practice Workbook

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7–7<br />

Name<br />

Date<br />

You can use the same steps to multiply numbers that contain<br />

zeros that you use to multiply any multidigit number.<br />

Find 305 × 4.<br />

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

Multiply Across Zeros<br />

4NS3.0, 4MR2.1<br />

Chapter Resources<br />

Step 1<br />

Think in terms of hundreds, tens,<br />

<strong>and</strong> ones.<br />

305 is 3 hundreds + 0 tens <strong>and</strong><br />

4 ones.<br />

Step 3<br />

Step 2<br />

Multiply the ones.<br />

2<br />

305<br />

→<br />

× 4 4 × 5 = 20<br />

0<br />

Step 4<br />

Regroup 20 ones as 2 tens +<br />

0 ones. Be sure to put the<br />

2 in the tens column above<br />

the 0.<br />

Multiply the tens.<br />

Multiply the hundreds.<br />

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

2<br />

305<br />

→<br />

× 4<br />

20<br />

Multiply.<br />

4 × 0 tens = 0 tens<br />

Add the regrouped 2 tens.<br />

0 tens + 2 tens = 2 tens<br />

1. 402 × 8 =<br />

2. 7,009 × 3 =<br />

3. 5 × 301 =<br />

4. 6 × 9,020 =<br />

2<br />

305<br />

↖<br />

× 4<br />

1220<br />

4 × 3 hundreds = 1 thous<strong>and</strong> +<br />

2 hundreds. 0 ones + 2 tens +<br />

2 hundreds + 1 thous<strong>and</strong> = 1220<br />

5. 2 × 1,099 =<br />

6. 7 × 8,107 =<br />

7. 806 × 9 =<br />

8. 5,007 × 4 =<br />

Grade 4 131 Chapter 7

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