Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10:
ISBN 13:

Chapter 4 - Decimals - Test - Page 325: 9

Answer

Estimate: 8 + 80 + 40 = 128 Exact: 129.2028

Work Step by Step

7.6 + 82.0128 + 39.59 Let's first find the Estimate: 7.6 (rounded to) 8 82.0128 (rounded to) 80 39.59 (rounded to) 40 7.6 + 82.0128 + 39.59 = 8 + 80 + 40 = 128 Now, Lets find exact: 7.6 + 82.0128 + 39.59 i.e. 111 7.6000 + 82.0128 + 39.5900 ________ 129.2028
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