Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10:
ISBN 13:

Chapter 4 - Decimals - Review Exercises - Page 322: 37

Answer

Estimated: Dollar 30 is new bank balance Exact : Dollar 15.8 is new bank balance

Work Step by Step

Here Jasmin started with dollars 406, she paid dollars 315.53 to day care and dollars 74.67 at grocery store. To find balance we need to find the difference i.e. subtraction. First lets find estimate with front end rounding. 406 (rounds to) 400 315.53 (rounds to) 300 74.67 (rounds to) 70 Estimated new bank balance : 400 - 300 - 70 = 30 Now let's find the final exact answer 406 -315.53 ____ 90.47 90.47 -74.67 ______ 15.8
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