Question

(-2/3).(+3/10)-(+1/2).(-1/3) é:

Answer 1

$(\frac{-2}{3})(\frac{3}{10}) - (\frac{1}{2})(\frac{-1}{3})=$

$\frac{-6}{30} - (\frac{-1}{6})=$

$\frac{-6}{30}+\frac{1}{6} =$

mmc(30,6) =30

$\frac{-6+5}{30} =$

$\frac{-1}{30}$