Elementary Technical Mathematics

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. $\ \ \ 51.70$ $\underline{-\ \ 1.11}$ $\ \ \ 50.59$ $\underline{-\ \ 4.60}$ $\ \ \ 45.99$ $\underline{+84.10}$ $\ 130.09$