Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 1 - Section 1.5 - Subtracting Real Numbers - Practice - Page 40: 4



Work Step by Step

$-\frac{1}{4}-(-\frac{2}{5})=-\frac{5}{20}+\frac{8}{20}=\frac{3}{20}$ First, find a least common denominator. In this instance it is 20, then follow the operators. Subtracting two negative terms leads to their absolute values to be subtracted, and the sign of the largest absolute value to be the one of the answer.
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