Trừ hai phân số khác mẫu số: a) 6/5 - 2/3 b) 1 - 4/5 c) 5/12-1/4d) 7/8-1/6

~ Bạn tham khảo ~

`a, 6/5 - 2/3`

`= 18/15 - 10/15`

`= [18 - 10]/15`

`= 8/15`

`b, 1 - 4/5`

`= 5/5-4/5`

`= [5-4]/5`

`= 1/5`

`c, 5/12 - 1/4`

`= 5/12 - 3/12`

`= [5-3]/12`

`= 2/12`

`= 1/6`

`d, 7/8 - 1/6`

`= 21/24 - 4/24`

`= [21-4]/24`

`= 17/24`