Question

Sendo A = (5/4):(-3/2) e B = (0,5).(2/5), A+B é:​

Answer 1

A = $\frac{5}{4}$ / $\frac{-3}{2}$  =  

B = $\frac{1}{2}$ x $\frac{2}{5}$  =  $\frac{1}{5}$

A + B = $\frac{-10}{12}$ + $\frac{1}{5}$  =  $\frac{(-10)*5 + 1*12}{12*5}$  =  $\frac{-50+12}{60}$  =  $\frac{-38}{60}$  = $\frac{-19}{30}$

A - B = $\frac{-10}{12}$ - $\frac{1}{5}$ = $\frac{(-10)*5 - 1*12}{12*5}$ = $\frac{-50-12}{60}$ = $\frac{-62}{60}$ = $\frac{-31}{30}$