Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 1 - Whole Numbers - 1.10 Solving Application Problems - 1.10 Exercises: 6

Answer

Estimate: 30,000 + 5000 + 2000 + 20,000 + 10,000 = 67,000; Exact: 64,788

Work Step by Step

It seems that the question is rounding 4-digit numbers to the nearest thousand and 5-digit numbers to the nearest ten-thousand, so we round 32,815 down to 30,000 and round 9815 up to 10,000. By adding up the estimates we get 67,000 and by adding up the actual numbers we get 64,788.
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