Answer:
-8
Explanation:
This is like saying 32-40. The way I think about this is 40-32, but when you get your answer, put the negative sign before it. For example, in this case...
40-32=8, after adding the negative to the front...-8.
32-40 is actually -8, so it works!!
My way of solving this isn't necessarily the only right way to do this, but I hope I helped you out...have a great day ^^