Answer
123.588
Work Step by Step
Subtract the digits in each column of numbers.
$1\overset3/\!\!4\overset9/\!\!0.\overset9/\!\!0\overset9/\!\!0\overset{10}0$
$\underline{\ \ 1\,6\,.4\,1\,2}$
$1\,2\,3\,.5\,8\,8$
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