What is the change in temperature from - 45 to - 71

-26 is the change because - 71 - - 25 is - 26

I do these types of problems a little different then some may. I turn this into a positive and see how far it is like that.

When thinking of it like that, how many numbers are between 45 and 71?

Just subtract 71-45 = 26.

So know we know that there are 26 numbers in between 45 and 71.

If you go back to the original problem, you will see to get from - 45 to - 71, you have to - 26.

So the temperature has to drop 26 degrees making your change in temperature - 26 degrees.