#### Answer

27

#### Work Step by Step

1. Subtract the ones column by regrouping, so 6 becomes 16.
16 - 9 = 7
2. Subtract the tens column, where 4 becomes 3.
3 - 1 = 2
Therefore, the answer is 27.

Published by
Pearson

ISBN 10:
0321825535

ISBN 13:
978-0-32182-553-7

27

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