Question

Efetue as adições: (+3/5)+(-1/3)+(-2/5)

Answer 1

$\displaystyle \mathsf{\frac{3}{5} + (\frac{-1}{3}) + (\frac{-2}{5})}$

Fazemos o jogo de sinais:

$\displaystyle \mathsf{\frac{3}{5} - \frac{1}{3} - \frac{2}{5}}$

O m.m.c = 15

$\displaystyle \mathsf{\frac{9 - 5 - 6}{15} = \frac{-2}{15}}$

Resposta: -2/15