## Prealgebra (7th Edition)

Published by Pearson

# Chapter 2 - Cumulative Review - Page 161: 45

#### Answer

$-21$

#### Work Step by Step

$-7\times3$ is the same as $7\times3$ but simply take the opposite. Since $7+7+7=21$, you know $7\times3$ is 21, so change it to $-21$

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