Question

3. Efetue: a) 5/8 + 3/8 + 4/8= b) 1/2 + 3 + 4/5 = c) 17/5 – 7/4 + 3/10 = d) 9/4 + 7/4 – 20/4 = e) 4/9 x 18/36 x 5/8 = g) 3/5 x 5/3 x 6/7 x 7/6= h) 13/8 ÷ 26/9 = i) 10 ÷ 5/8 = j) (3/2 + 1/4 - 3/8) ÷ 11/2 =

Answer 1

Oi...

a) 5/8 + 3/8 + 4/8

5 + 3 + 4/8

12/8 ÷ 4

3/2

b) 1/2 + 3 + 4/5 ⇒mmc = 10

5 + 30 + 8/10

43/10

c) 17/5 – 7/4 + 3/10 ⇒mmc=20

68 - 35 + 6/20

39/20

d) 9/4 + 7/4 – 20/4

9 + 7 - 20/4

-4/4

-1

e) 4/9 x 18/36 x 5/8

2/9 × 5/8

1/9 × 5/4

5/36

f) 3/5 x 5/3 x 6/7 x 7/6 ⇒simplifique os números

1

g) 13/8 ÷ 26/9

13/8 × 9/26

1/8 × 9/2

9/16

h) 10 ÷ 5/8

10 × 8/5

2 × 8

16

i) (3/2 + 1/4 - 3/8) ÷ 11/2

(12 + 2 - 3/8) ÷ 11/2

11/8 ÷ 11/2

11/8 × 2/11

2/8 ÷ 2

1/4

Espero ter ajudado.