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 - Exercise Set - Page 273: 39



Work Step by Step

LCD is 30. $-\frac{2}{5}+\frac{1}{3}-\frac{3}{10}=-\frac{2\times6}{5\times6}+\frac{1\times10}{3\times10}-\frac{3\times3}{10\times3}=-\frac{12}{30}+\frac{10}{30}-\frac{9}{30}=\frac{-12+10-9}{30}=\frac{-11}{30}$
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