Answer
130.09
Work Step by Step
Align the decimals. Add zeroes to the right without changing the value. Add or subtract as you would a whole number, keeping the decimal in its original column.
$\ \ \ 51.70$
$\underline{-\ \ 1.11}$
$\ \ \ 50.59$
$\underline{-\ \ 4.60}$
$\ \ \ 45.99$
$\underline{+84.10}$
$\ 130.09$
