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18 December, 02:10

Use rounding to estimate the product 12*9. Then, use compensation to find the actual answer. If Alison was rounding to find how much 12 books that were $9 apiece cost, would she get a good estimate? Explain.

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  1. 18 December, 02:29
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    I would do 12 x 10 = 120

    to compensate do 120 - 12 = 108 same as 12*9 = 108

    The estimate is decent, because we are only $12.00 from the real answer.
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