thực hiện phép tính a) 10/11 + 3/11:3 b)-3/7+ 5/13 + 3/7 C) -3/13 +7/12-10/13 d) 5/3x7/2+ 5/3x 21/25-5/3x 7/25

`a) 10/11 + 3/11 : 3`

`= 10/11 + 3/11 xx 1/3`

`= 10/11 + 1/11`

`= 1`

`b) -3/7+ 5/13 + 3/7`

`= (-3/7 + 3/7) + 5/13`

`= 0 + 5/13`

`= 5/13`

`c) -3/13 + 7/12 - 10/13`

`= -3/13 +7/12 + (-10/13)`

`= [(-3/13) + (-10/13)] + 7/12`

`= -1 + 7/12`

`= -5/12`

`d) 5/3 xx 7/2 + 5/3 xx 21/25 - 5/3 xx 7/25`

`= 5/3 xx (7/2 + 21/25 - 7/25)`

`= 5/3 xx 203/50`

`= 203/50`

`color{lightgreen}{@SunDayy}`