First use front-end rounding to write an estimate of the answer, and then subtract the decimals to obtain an exact answer.EstimateProblem
?
A. Estimate: 71, exact: 74.64
B. Estimate: 81, exact: 84.74
C. Estimate: 71, exact: 74.74
D. Estimate: 81, exact: 81.64
Answer: A
Mathematics
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+ 11
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