What number do you add to get from

-6250 to - 10

(positive) 6,240

Explanation:

You're asking how to get to - 10 from - 6,250, so first you must remember for example, - 1+1=1, because you're adding a regular positive number to it. It would be the same with your question. - 6,250+6,240=-10.

Answer:-6530