Question

calcule as frações a) 2/5 + 3/10 b) 7/2. 4/9 c) 7/3 - 3/2 + 5/4 d) 8/7 : 9/2 pfvr

Answer 1

Resposta:

a)7/10

b)28/1

c)25/12

d)1/56

Explicação passo-a-passo:

a) 2/5 = 4/10

4/10 + 3/10 = 7/10

b) 7/2 = 63/18

4/9 = 8/18

63/18. 8/18 = 504/18 = 28/1

c) 7/3 = 56/24

3/2 = 36/24

5/4 = 30/24

56/24 - 36/24 = 20/24 + 30/24 = 50/24 = 25/12

d) 8/7 = 16/14

9/2 = 63/14

16/14 : 63/14 = 0,25/14 = 1/56