Maybe because you're finding the "difference" between the two numbers. We could also question why the answer to an addition problem is called sum.
Well, 'sum'body said that's what they should be called a long time ago, that's why we're using that term to call them now.
Answer:
c
Step-by-step explanation:
That is the correct answer
that is correct
There’s no work for you to show
Depends on how much space you have on your device