-3+12/4 Insert brackets in the correct place to make 2.25

You need to place the number (-3) to numerator and to put the difference -3+12 into brackets, such that:

`(-3+12)/4 = 9/4 = 2.25`

If you place the number -3 outside the brackets, the evaluation will be different, such that:

`-3 + (12/4) = -3 + 3 = 0`

Hence, the value of 2.25 may be obtained, in this case, by placing the sum -3+12 between brackets and the result will be 2.25.