Question

(5\8+2\5) : 3 5\12 . 1 1\2 . 2

Answer 1

(5\8+2\5) : 3 5\12 . 1 1\2 . 2= 1/10
Resolvendo por partes:
5/8 + 2/5 = ---mmc(8.5) = 40
25/40 + 16/40 = 41/40

3  5/12 = 41/12
1  1/2 = 3/2

41/12 . 3/2 . 2 = 246/24  (simplificando por 6) = 41/4

Fica assim:
41/40 : 41/4 = 41/40 . 4/41 = 1/10 (simplificando cruzado)