Respostas

2014-02-20T23:11:06-03:00
A) 1/4 • 1/2 + 1/2
1/8 + 1/2
1/8 + 4/8
5/8

b) (5/2 + 1/3) : 75/100
(15/6 + 2/6) : 15/20
17/6 : 3/4
17/6 • 4/3
68/18
34/9

c) 1/9 + 4/3
1/9 + 12/9
13/9
10 3 10