math
posted by GamerGuy .
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.

12 * 10 = 120

Can you please explain why this is your answer?

I estimated by rounding 9 up to 10.
12 * 10 = 120
12 * 9 = 108 
8267 2761

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.