Answer:
The temperature increases by a total of 12 degrees.
Explanation:
A good way to solve a problem with positive and negative integers is to plot them on a number line and find the difference from one point to the next. On a number line, positive numbers go to the right of zero and negative numbers go to the left of zero. If we start at a temperature of -4 and count to the right on the number line until we get to +8, there will be a difference of 12. The other way to set up the problem is to subtract the numbers, 8-(-4)=12.