How can I solve 6 - (-5)

Two negatives make a positive

Answer: + 11

Step-by-step explanation: When you're adding and subtracting positives and negatives and you see a minus a negative in a problem, you can change it to plus a positive.

So 6 - (-5) can be thought of as 6 + (+5).

So you don't even need your number line for this problem. Just add 6 + 5 to give you a sum of + 11. This means that 6 - (-5) or 6 + (+5) is + 11.