Answer
21
Work Step by Step
First, subtract he ones place 2 - 1 = 1
Next, subtract the tens place 8 -6 = 2
With the 2 in the tens place and 1 in the ones place, we get 21.
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 - Summary Exercises - Whole Number Computation - Page 63: 8
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