Sos cứu e mn ơi help me

`a) (-5) : 2 1/5 = -5 : 11/5 = - 5 * 5/11 = -25/11`

`---------`

`b) (7 - 1/2 - 3/4) : (5 - 1/4 - 5/8)`

`= (28/4 - 2/4 - 3/4) : (40/8 - 2/8 - 5/8)`

`= 23/4 : 33/8`

`= 23/4 * 8/33`

`= 46/33`

`---------`

`c) - (3/5 + 3/4) - (-3/4 + 2/5)`

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

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

`= -1+0=-1`

`---------`

`d) 2/3 - 1,5 + 2 1/4`

`= 2/3 - 3/2 + 9/4`

`= 8/12 - 18/12 + 27/12`

`= 17/12`

`color{WHITE}{#} color{blue}{P} color{green}{H} color{red}{O} color{pink}{N} color{orange}{G}`