Answer
$|-45|\gt |0|$
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, $a=|-45|=45,$ $b=|0|=0,$
Since $a-b=45-0=45\gt0,$
Then $a\gt b,$
Therefore, $|-45|\gt |0|$