math
posted by sandy .
The lowest temperature ever recorded in the state of Oregon was54°F (in Seneca, on February 10, 1933). The state’s record high temperature occurred in Pendleton on August 10, 1898, when it reached 119°F. What is the historical temperature range in the state of Oregon?

The "range" of anything is the difference (distance, of a sort) between the two. Normally, you'd just subtract, but since one of the numbers you are referring to, I think, is a negative (54 degrees, right?), your problem will look like this:
119  (54) = range
What happens when you have two negatives in a subtraction problem?
http://www.aaastudy.com/sub.htm#topic54
Click on Subtraction Equations  2 Digit Integers. Then let us know what you come up with, and someone here will give you feedback.
=)