Answer
Rounding: 5
Actual: 4.76
Work Step by Step
Rounding off the numbers:
$20\div4$ = 5
Actual answer:
$19.894\div4.179$ = 4.76
It is a reasonable estimate as the difference is only 0.24.
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: 19
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