Answer
$= - 100$
Work Step by Step
Recall the following rule:
$-a+(-b)=-a-b$
Thus, we obtain:
$= -55 + (-45)$
$= -55 - 45$
$= -100$
Elementary Algebra
by Kaufmann, Jerome; Schwitters, Karen;
Published by
Cengage Learning
ISBN 10:
1285194055
ISBN 13:
978-1-28519-405-9
Chapter 1 - Some Basic Concepts of Arithmetic and Algebra - 1.3 - Integers: Addition and Subtraction - Problem Set 1.3 - Page 20: 113
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