Hello! When adding positive numbers to a positive or negative number, the total goes up. When adding a negative number to a negative or positive number, the total goes down. For example: -3 + 4 = 1. Basically, do 4 - 3 = 1 and put the negative sign in front of the 1 to get -1. Another example. 7 + -5 = 2. You ignore the plus sign and do 7 - 5 to get your answer of 2. When subtracting integers, if you’re subtracting from a positive integer, you subtract regularly. When you’re subtracting a negative integer, you actually add. For example -8 - 6 = -14. You add 8 and 6 to get 14, and then put the negative sign in front of it. Another example: 7 - (-9) = 16. You add 7 and 9, because two negatives make a positive. When you do that, the sum is 16.