Question

Answer 1

a) 30/12 + 5/12 = 35/12

b) 14/21 - 9/21 = 5/21 

c) 20/6 = 10/3

d) 12/9 : 6/3 = 4/3 : 2 = 2/3

Answer 2

a) = 35/12

b) = 5/21

c) = 10/3

d) = 2/3

Answer 3

35/12

5/21

10/3

2/3

 

Answer 4

Câu 9.

a) 5/2 + 5/12 = 30/12 + 5/12 = 35/12

b) 2/3 - 3/7 = 14/21 - 9/21 = 5/21

c) 5/6 x 4 = 5/6 x 4/1 = 10/3 

d) 12/9 : 6/3 = 12/9 x 3/6 = 36/54 = 2/3.