Correct Answers:
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A. Complete each sentence. Fill in the blank with the correct answer.
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The value of 3775 × 22 is about
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The value of 2115 × 25 is about
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The value of 3948 × 21 is about
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The value of 5106 × 40 is about
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B. Type the rounded-off value of each factor in the box beside it. Then type the estimated product in the last box.
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