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: 17

Answer

$-1.3$

Work Step by Step

In adding two numbers with the same sign, perform the following steps: (1) Add their absolute values. $|-0.4| + |-0.9| = 0.4 + 0.9 = 1.3$ (2) The sum must have sign common to the addends. $-0.4+(-0.9) = -1.3$ Thus, the sum is $-1.3$.
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