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 65: 107


$$-8 - (-13) = 5$$

Work Step by Step

When we add two numbers with differing signs, we subtract the smaller absolute value from the greater absolute value first: $$|13| - |8| = 5$$ Then, we use the sign of the number with the greater absolute value for the sign of the sum. Therefore, $$-8 - (-13) = 5$$
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