Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10: 0134467795
ISBN 13: 978-0-13446-779-5

Chapter 9 - Basic Algebra - 9.2 Adding and Subtracting Signed Numbers - 9.2 Exercises - Page 641: 98


(a)-8;8 (b)2;-2 (c)-7;7 When you attempt to use the commutative property for a subtraction problem, the sign of the two results are opposite. The commutative property does not apply to subtraction.

Work Step by Step

(a) $-3-5=-3+(-5)=-8$ $5-(-3)=5+3=8$ (b) $-4-(-6)=-4+6=2$ $-6-(-4)=-6+4=-2$ (c) $3-10=-7$ $10-3=7$
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