## Basic College Mathematics (10th Edition)

Estimate: $630$ Exact: $568.11$
We need to multiply: $~~~65.3$ $\times ~~\underline{8.7}$ First, we estimate by rounding: $~~~~70$ $\times ~~\underline{9}$ $~~630$ Next, we find the exact answer: $~~~~~~~~~65.3$ $~~~~\times ~~\underline{8.7}$ $~~~~~~~~4571$ $+~~~\underline{52240}$ $~~~~~568.11$ We see that our estimate and exact answers are a bit off from each other.