-5
It is -25 because -15--25 = 10
-15
15
It is: 35-20 = 15
-5
It is -25 because -15--25 = 10
-15
Well honey, if you want to get from -5 to 10, you need to add 15, not subtract. But if you're really set on subtracting, then technically speaking, you'd subtract -15. Math can be a real tricky devil sometimes, but that's the cold, hard truth.
15
8
It is: 35-20 = 15
11/15 minus 3/10 = 13/30
15 + 15 + (10 * (1 / 2)) + (10 * (1 / 2)) = 40
10 + 15 + 20 = 45
42
60 -15 = 45