Thinking Mathematically (6th Edition)

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: 21

Answer

Rounded: 18 Actual: 18.24

Work Step by Step

Rounding off the numbers, Estimate of total cost of six grocery items = 8 + 1 + 3 + 0 + 1 + 5 = 18 Actual cost of the six grocery items, 8.47 + 0.89 + 2.79 + 0.14 + 1.19 + 4.76 = 18.24 It is a reasonable estimation because the difference between the two answers is only 0.24.
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