Answer
$|0|\lt |-9|$
Work Step by Step
If $a-b \lt 0$, then $a \lt b;$
If $a-b \gt 0$, then $a \gt b;$
If $a-b = 0$, then $a=b;$
In this problem, $a=|0|=0,$ $b=|-9|=9,$
Since $a-b=0-9=-9\lt0,$
Then $a\lt b,$
Therefore, $|0|\lt |-9|$
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