Question

Answer 1

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

`=-3/4 + 35/42`

`=-3/4 +5/6`

`=-9/12 + 10/12`

`=(-9+10)/12`

`=1/12`

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`0,75 - 2 1/3`

`=3/4 - 7/3`

`=9/12 - 28/12`

`=(9-28)/12`

`=-19/12`

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

`=-5/4 + 9/4`

`=(-5+9)/4`

`=4/4`

`=1`

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`-3 1/2 - 2 1/4`

`=-7/2 - 9/4`

`=-14/4 - 9/4`

`=-23/4`

Answer 2

`a, = -9/12 + 35/42`

`= -3/4 + 35/42`

`= 1/12`

`b, = 3/4 - 7/3`

`= -19/12`

`c, = -9/8 + 9/4`

`= 1,25`

`d, = -7/2 - 9/4`

`= -23/4`