Question

Tính :

5/2 - 2/3 + 5/4=

20/12 + 36/18 - 21/28=

1/2 - 1/6 - 1/9 =

Answer 1

`5/2 - 2/3 + 5/4`

`= 30/12 - 8/12 + 15/12`

`= (30-8+15)/12`

`= 37/12`

`----`

`20/12 + 36/18 -21/28`

`= 5/3 + 2-3/4`

`= 20/12 + 24/12 -9/12`

`= 35/12`

Answer 2

`5/2-2/3+5/4`

`=30/12-8/12+15/12`

`=37/12`

`20/12+36/18-21/28`

`=5/3+2-3/4`

`=20/12+24/12-9/12`

`=35/12`