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1. |
Estimate. Tell whether the estimate is greater or less than the actual product.  |
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A. |
60 × 10 = 600; less than |
B. |
65 × 20 = 1,300; less than |
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C. |
80 × 20 = 1,600; greater than |
D. |
70 × 20 = 1,400; greater than |
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Hint |
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2. |
Estimate. Tell whether the estimate is greater or less than the actual product. 
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A. |
80 × 80 = 1,600; less than |
B. |
80 × 80 = 6,600; less than |
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C. |
80 × 80 = 4,800; less than |
D. |
80 × 80 = 6,400; less than |
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Hint |
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3. |
Estimate. Tell whether the estimate is greater or less than the actual product. 
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A. |
$70 × 10 = $700; greater than |
B. |
$80 × 20 = $160; greater than |
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C. |
$80 × 20 = $1,600; greater than |
D. |
$70 × 10 = $700; less than |
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Hint |
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4. |
Find the product. Use estimation to check. 815 × 21 |
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A. |
6,115 |
B. |
17,115 |
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C. |
1,615 |
D. |
1,715 |
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Hint |
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5. |
Find the product. Use estimation to check. $983 × 49 |
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A. |
$74,176 |
B. |
$48,167 |
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C. |
$84,176 |
D. |
$4,816 |
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Hint |
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