#### Answer

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#### Work Step by Step

The absolute value of a number $a$ is equal to $a$ if $a\geq0$ and is equal to $-a$ if $a\lt0$.
$-1\lt0$, $-2\lt0$, and $-3\lt0$
Therefore, $|-1|+|-2|-|-3|=1+2-3=(1+2)-3=3-3=0$.

Published by
Pearson

ISBN 10:
0321969359

ISBN 13:
978-0-32196-935-4

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