Question

Bài 1 :
`-4,75-1 7/12 `

`-9/12-(-35/42)`

`0,75- 2 1/3 `

`-1 1/4-(-2,25)`

Answer 1

`-4,75 - 1 7/12`

`=-475/100 - 19/12`

`=-19/4 - 19/12`

`=-57/12 - 19/12`

`=-76/12`

`=-19/3`

`-9/12 - (-35/42)`

`=-9/12 - (-5/6)`

`=-3/4 + 5/6`

`=-9/12 + 10/12`

`=1/12`

`0,75 - 2 1/3`

`=75/100 - 7/3`

`=3/4 - 7/3`

`=9/12 - 28/12`

`=-19/12`

`-1 1/4 - (-2,25)`

`=-5/4 - (-225/100)`

`=-5/4 - (-9/4)`

`=-5/4 + 9/4`

`=4/4`

`=1`