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 64: 85

Answer

To add two numbers with different signs, subtract the numbers and then copy the sign of the number with the greater absolute value.

Work Step by Step

To add two numbers with different signs, subtract the numbers and then copy the sign of the number with the greater absolute value. For example, \begin{array}{l}\require{cancel} -5+6 \\= +(6-5) \text{ (subtract the numbers)} \\= +(1) \\= 1 \text{ (copy the sign of $6$)} \\\\ 5+(-8) \\= -(8-5) \text{ (subtract the numbers)} \\= -(3) \\= -3 \text{ (copy the sign of $8$)} .\end{array}
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