Basic College Mathematics (9th Edition)

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

Chapter 1 - Whole Numbers - 1.3 Subtracting Whole Numbers - 1.3 Exercises - Page 28: 21

Answer

12

Work Step by Step

Given that the difference between 54 and 42 is 12 we use addition to check the answer to a subtraction problem. 42+12=54 Check The number needed to complete the check is 12.
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