Question

Resolva as expressões abaixo:
(1/4 + 2/3) * 3/9
2/3 x 1/5
2/3 : 3/4
1/4 + 3/9 + 5/10 + 5/9

Por favor me ajudem é para amanhã

Answer 1

Resolva as expressões abaixo:

a)

(1/4 + 2/3) * 3/9

mmc = 12

3/12 + 8/12 = 11/12

11/12 * 3/9 = 11/36

2/3 x 1/5

2/3 : 3/4

1/4 + 3/9 + 5/10 + 5/9

b)

(2/3)*(1/5) = 2/15

c)

(2/3)/(3/4) = (2/3)*(4/3) = 8/9

d)

1/4 + 3/9 + 5/10 + 5/9

1/4 + 3/9 + 1/2 + 5/9

1/4 + 2/4 + 8/9

3/4 + 8/9 = (27 + 32)/36 = 59/36