Question

x+y (para x=1/2 e y = -1/5)​

Answer 1

Resposta:

1/2 + 1/4 : 1 + 1/2 × 1/4

3/4 : 1 + 1/8

3/4 : 9/8

3/4 × 8/9 =

24/36 = 2/3

Answer 2

Resposta:

$\frac{3}{10}$

Explicação passo-a-passo:

$\frac{1}{2} +$$\frac{-1}{5}$=  mmc=10

$\frac{5-2}{10}$= $\frac{3}{10}$