Prealgebra (7th Edition)

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

Chapter 4 - Section 4.1 - Introduction to Fractions and Mixed Numbers - Practice - Page 218: 14



Work Step by Step

$\frac{9}{9}=1$ We know this, because any number divided by itself equals one. (i.e. $\frac{4}{4}=1, \frac{221}{221}=1, \frac{a}{a}=1$)
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