Question

ola quais sao as respostas das contas
a)7/12+5/6+1/3
b)11/6+3/4-1/2
c)5/4+7/6-2/3
d)13/9+5/8-7/12

Answer 1

(A) 7/12 + 5/6 + 1/3

MMC

3,7,12 | 2
3,7,6 | 2
3, 7, 3| 3
1,7, 1. |7
1, 1, 1. |

2 × 2 × 3 × 7 = 12 × 7 = 84

7/12 + 5/6 + 1/3

84 ÷ 12 = 7 × 7 = 49
84 ÷ 6 = 14 × 5 = 70
84 ÷ 3 = 28 × 1 = 28

49 +70 + 28 = 147/84

147/84 ÷ 3 = 49/28