Answer
Rounding: 16
Actual: 15.71
Work Step by Step
Rounding off the numbers, it becomes
2 + 4 + 10 = 16
Actual answer is = 1.57 + 4.36 + 9.78 = 15.71
The estimate is reasonable as the difference between the two answers is only 0.29.
Thinking Mathematically (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0321867327
ISBN 13:
978-0-32186-732-2
Chapter 1 - Problem Solving and Critical Thinking - Chapter Summary, Review, and Test - Review Exercises - Page 43: 17
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