Prealgebra (7th Edition)

Published by Pearson
ISBN 10: 0321955048
ISBN 13: 978-0-32195-504-3

Chapter 4 - Section 4.5 - Adding and Subtracting Unlike Fractions - Practice - Page 267: 3



Work Step by Step

$-\frac{1}{5}+\frac{9}{20}$ $=\frac{9}{20}-\frac{1}{5}$ $=\frac{9\times1}{20\times1}-\frac{1\times4}{5\times4}$ $=\frac{9}{20}-\frac{4}{20}$ $=\frac{5}{20}$ $=\frac{1}{4}$
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