Question

The Fairbanks,Alaska, a typical January temperature is -13F and a typical April temperature is 30F. What is the difference between these temperatures?

Answer 1

t- temperature in January
T-temperature in April

Δ- difference beteween temperature

Δ=T-t
Δ=30F-(-13F)=30F+13F=43F

Answer 2

The difference between +30 and -13 is 43 degrees.