Answer
subtraction
Work Step by Step
Subtraction is performing an addition operation backwards, so it is another way of making sure the right numbers add up.
Basic College Mathematics (9th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
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 29: 69
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