Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 1 - Section 1.5 - Addition of Real Numbers - Exercise Set - Page 63: 19



Work Step by Step

In adding two numbers with the same sign, perform the following steps: (1) Add their absolute values. $|-\frac{7}{10}| + |-\frac{3}{10}| = \frac{7}{10} + \frac{3}{10} = \frac{10}{10}=1$ (2) The sum must have sign common to the addends. $-\frac{7}{10}+(-\frac{3}{10}) = -1$ Thus, the sum is $-1$.
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