The temperature in the afternoon was 10 degrees. By 8 pm, the temperature was - 5

degrees. By how many degrees did the temperature change?

10-10 and then - 5

So 10 + 5 = 15

So the temperature would chance - 15 degrees

The temperature had dropped by 15 degrees (-15 if you don't want it positive.)

Step-by-step explanation:

Okay!

This is a subtraction problem.

If it started off at 10, and went down to - 5, we can do |-5 - 10| (I am using the two bars because it said change.) And we get 15!