Adding and Subtracting Positive and Negative Numbers

Learn how to add positive and negative numbers. Once you know the rules that apply it can be easy and fun.
Math Standards Involved
MGSE6.NS.6a Recognize opposite signs of numbers as indicating locations on opposite sides of 0 on the number line; recognize that the opposite of the opposite of a number is the number itself, e.g.,
–(–3) = 3, and that 0 is its own opposite.

[anthonybarroque]

Why was the last answer positive 3 instead of negative three