Prealgebra (7th Edition)

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

Appendix B - Exercise Set - Page 742: 59



Work Step by Step

Use the definition of negative exponents. $5^{-1}+10^{-1}=\frac{1}{5}+\frac{1}{10}=\frac{1\times2}{5\times2}+\frac{1}{10}=\frac{2}{10}+\frac{1}{10}=\frac{3}{10}$
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