Homework Help: math

Posted by GamerGuy on Tuesday, September 18, 2012 at 6:19pm.

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.

math - Ms. Sue, Tuesday, September 18, 2012 at 6:28pm
12 * 10 = 120
math - GamerGuy, Tuesday, September 18, 2012 at 6:34pm
Can you please explain why this is your answer?
math - Ms. Sue, Tuesday, September 18, 2012 at 6:44pm
I estimated by rounding 9 up to 10.

12 * 10 = 120

12 * 9 = 108

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