Question

quanto vale a-b a=2/5 e b=3/10​

Answer 1

Resposta:

a - b = 1 / 10

a = 2 / 5

b = 3 / 10

$\frac{2}{5} - \frac{3}{10} = \frac{20 - 15}{50} = \frac{5}{50} = \frac{1}{10}$

Answer 2

Resposta:

2/5=40% ,0,4

3/10=0,3, 30%