Respostas

2013-09-28T14:15:35-03:00
A) 1/5 já está na forma irredutível 
as restantes precisam ser simplificadas

b) 4/8 = 1/2

c) 20/30 = 2/3

d) 200/150 = 20/15 = 4/3
2013-09-28T14:17:18-03:00
A)R=1/5
B)R=4/8=2/4=1/2
C)R=20/30=10/15=2/3
D)R=200/150=100/75=20/15=4/3