Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 1 - Some Basic Concepts of Arithmetic and Algebra - Chapter 1 Review Problem Set: 1

Answer

$-3$

Work Step by Step

The numbers being added have different signs. To add these numbers, perform the following steps: (1) Subtract the bigger absolute value by the smaller absolute value to obtain: $|-10| - |7| = 10-7 = 3$ (2) The sum will have the same sign as the number with the bigger absolute value. Since $|-10| \gt |7|$, then the sum will be negative. Thus, $7+(-10) = -3$
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