Question

o valor da expressao (2+1/2+1/8) / (3/8+1) e:
a)13
b)21/11
c)1/2
d)2/11

Answer 1

letra b ⇒ 21/11

(2 + 1/2 + 1/8) / (3/8 + 1) =    MMC=8
(16/8 + 4/8 +1/8) / (3/8 + 8/8) =
(21/8) / (11/8) =
21/8 . 8/11 =  Simplificando o 8 com o 8
21/1 . 1/11 = 21/11