What is the difference between 9 and - 2? - 11 11 7 - 7

11 is the difference

The difference between the values 9 and - 2 is 11. You have 9 positive units, then you're taking away negatives. This is the same as adding positive units. Therefore, your equation would look like 9 + 2 = ? instead of 9 - - 2 = ?.

9 + 2 = 11, so 11 is your answer.