Today in math we learned how to subtract integers.
5 - 2 =3

(-5) - (-3) = 2

Show using chips :
(-7) - (-3) =
3 - (-4) =
(-6) - 2 =
(-2) - (-5) =

This morning it was -2. This afternoon will be 3. Determine the difference of these temperatures.
Method 1)
Subtract the morning temperature from the after noon temperature.
3 - (-2) = 5
Method 2)
Subtract afternoon temperature from the morning temperature .
(-2) - 3= 5
Sorry if it's confusing, I tried my best to explain it :)