Question

a)2/3+4/9 - 3/5 b)3/8 + 1/3 c)8/9 + 1/5-2/3 d)2/5 + 8/3 e)5/4 - 7/6 f)3/4 - 1/2 + 2/3

Answer 1

OI

a)

2 / 3 + 4 / 9 - 3 / 5 →o mmc de (3,9,5) = 45

30 + 20  - 27/45

23/45

b)

3 / 8 + 1 / 3 → o mmc (8,3)=24

9 + 8 / 24

17/24

c)

8 / 9 + 1 / 5 - 2 / 3→ o mmc (9,5,3) = 45

40 + 9 - 30/45

19/45

d)

2 / 5 + 8 / 3→ o mmc (5,3)= 15

6 + 40 / 15

46/15

e)

5 / 4 - 7 / 6 →o mmc (4,6) = 12

15 - 14/12

1/12

f)

3 / 4 - 1 / 2 + 2 / 3→o mmc (4,2,3) = 12

9 - 6 + 8/12

11/12

Espero ter ajudado.

Bons estudos.

Answer 2

Resposta:

Explicação passo-a-passo: