Respostas
Resposta:
a) 5/8 + 7/12 = 29/24
b) 7/9 - 1/6 = 11/18
c) 4/5 + 1/2 - 5/8 = 27/40
d) 2 + 3/6 = 5/2
e) 8/12 - 5/12 = 1/4
Explicação passo-a-passo:
a) MMC
8, 12 2
4, 6 2
2, 3 2
1, 3 3
1,1 24
24÷12 -> 2 -> 2*7 -> 14/24
24÷8 -> 3 -> 3 * 5 -> 15/24
14/24 + 15/24 = 29/24
b) MMC
9, 6 2
9, 3 3
3, 1 3
1,1 18
18÷9 -> 2 -> 2*7 -> 14/18
18÷6 -> 3 -> 3*1 -> 3/18
14/18 - 3/18 = 11/18 -> não simplifica
c) MMC
5, 2, 8 2
5, 1, 4 2
5, 1, 2 2
5, 1, 1 5
1, 1, 1 40
40÷5 -> 8 -> 8*4 -> 32/40
40÷2 -> 20 -> 20*1 -> 20/40
40÷8 -> 5 -> 5*5 -> 25/40
32/40 + 20/40 = 52/40 - 25/40 -> 27/40 -> não simplifica
d) MMC
1, 6 2
1, 3 3
1, 1 6
6÷1 -> 6 -> 6*2 -> 12/6
6÷6 -> 1 -> 1*3 -> 3/6
12/6 + 3/6 = 15/6 -> Simplifica -> 5/2
e)
8/12 - 5/12 = 3/12 -> Simplifica -> 1/4