Question

alguem sabe???
3 - 5 =
8 12

Answer 1

$\frac{3}{8} - \frac{5}{12}$

MMC entre 8 e 12

8   12  | 2
4     6  | 2
2     3  | 2
1     3  | 3
1    1   | 

2*2*2*3 = 24

$\frac{3}{8}- \frac{5}{12} = \frac{3*3+2*5}{24} \\ \\ \frac{9+10}{24} = \frac{19}{24}$

R: 19/24