Giúp mik vs mik vote 5s ?( đúng + chi tiết )

`a)`

        `31/23- (7/32 + 8/23)`

`=31/23- 7/32- 8/23`

`= 1- 7/32`

`= -25/32`

`b)`

        `(1/3+ 12/67 + 13/41)-(79/67 - 28/41)`

`= 1/3+ 12/67 + 13/41- 79/67 + 28/41`

`= (28/41+ 13/41)-(79/67- 12/67)+ 1/3`

`= 1- 1+ 1/3`

`= 0+ 1/3`

`= 1/3`

`c)`

        `(-30,75)+(31/10- 69,25)-(-6,9)`

`= -30,75 + 3,1 - 69,25 + 6,9`

`= (3,1+ 6,9)-(30,75+ 69,25)`

`= 10-100`

`= -90`

`d)`

        `(-34,5). 11/25- 65,5 . 11/25`

`= 11/25. (-34,5- 65,5)`

`= 11/25. (-100)`

`= -44`

`#` $kiddd$