Question

quanto e (1/5 x 2/3) + 1/2

Answer 1

(1/5 x 2/3) + 1/2
= (1 x 2)/(5 x 3) + 1/2
= 2/15 + 1/2
= (2 x 2)/(15 x 2) + (1 x 15)/(2 x 15) 
= 4/30 + 15/30
= 19/30

Answer 2

Primeiro entre os parenteses: 1/5 x 2/3 -> 2/15
Após isso efetue a soma: 2/15 + 1/2 -> 19/30.