Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 1 - Section 1.4 - Adding Real Numbers - Practice - Page 34: 14



Work Step by Step

Two numbers that are the same distance from 0 but lie on opposite sides of 0 are called opposites of each other. We know that the opposite of a number $a$ is $-a$, because $a+(-a)=a-a=0$. Therefore, the opposite of 12 is -12, because $12+(-12)=12-12=0$.
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