Question

Tính:

3/8 + 5/4 = ........................

3/15 x 9 = .........................

9/12 - 2/3 = ......................

5/6 : 2/3  = .......................

Answer 1

` 3 / 8 + 5 / 4 = 3 / 8 + 10 / 8 = 13 / 8`

`3 / 15 xx 9 = [ 3 xx 9 ] / 15 = 27 / 15`

`9 / 12 - 2 / 3 = 9 / 12 - 8 / 12 = 1 / 12`

`5 / 6 : 2 / 3 = 5 / 6 xx 3 / 2 = [ 5 xx 3 ] / [ 6 xx 2 ] = 5 / 4`

Answer 2

13/8                   

9/5

1/12                 

5/4

Answer 3

3/8 + 5/4 = 3/8 + 10/8 = 13 / 8

3/15 x 9/1 = 27/15

9/12 - 2/3 = 9/12 - 8/12 = 1/12

5/6 : 2/3 = 5/6 x 3/2 = 15/12

Answer 4

3/8 + 5/4 = 3/8 + 10/8 = 13/8

3/15 x 9/1 = 27/15

9/12 - 2/3 = 9/12 - 8/12 = 1/12

5/6 : 2/3 = 5/6 x 3/2 = 15/12

Answer 5

3/8 + 5/4 = 3/8 + 10/8 = 13/8
3/15 x 9 = 9/5
9/12 - 2/3 = 9/12 - 8/12 = 1/12
5/6 : 2/3 = 5/6 x 3/2 = 5/4