Question

1. Realize as seguintes subtrações de frações:
a)2/3 -1/2
b)3/4-7/10
c)5/9-2/6
d)11/15-1/2
2.Determine o valor de cada expressão
a)7/6 +4/6 -5/6 +3/6 -9/6
b)5/6 -1/2 -1/3​

Answer 1

1)

a) 2/3 - 1/2, fazendo o MMC entre 2 e 3, temos 6

4/6 - 3/6 =1/6

b) 3/4 - 7/10, MMC igual a 20

15/20 - 14/20 = 1/20

c) 5/9 - 2/6, MMC igual a 18

10/18 - 6/18 = 4/18

d) 11/15 - 1/2, MMC igual a 30

22/30 - 15/30 = 7/30

2)

a) 7/6 + 4/6 - 5/6 + 3/6 - 9/6 = 0

b) 5/6 - 1/2 - 1/3, MMC igual a 6

5/6 - 3/6 - 2/6 = 0