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1. |
Use mental multiplication. 3 × 400 |
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|
A. |
1,200 |
B. |
3,400 |
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|
C. |
12,000 |
D. |
120 |
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Hint |
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2. |
Use mental multiplication. 100 × 24 |
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|
A. |
2,400 |
B. |
124 |
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|
C. |
24,000 |
D. |
240 |
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Hint |
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3. |
Use mental multiplication. 50 × 30 |
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|
A. |
1,500 |
B. |
5,030 |
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|
C. |
150 |
D. |
15,000 |
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Hint |
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4. |
Use mental multiplication. 800 × 20 |
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|
A. |
16,000 |
B. |
400 |
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|
C. |
1,600 |
D. |
820 |
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Hint |
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5. |
Tell which expression represents the number of zeros in the product 600 ×70. |
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A. |
2 + 1 = 3 |
B. |
6 + 7 = 13 |
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C. |
2 × 1 = 2 |
D. |
3 + 2 = 5 |
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Hint |
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