Adding/subtracting negative numbers Khan Academy 559 09:16
Negative number word problems 1 Khan Academy 556 04:21
Why subtracting a negative is equivalent to adding a positive Khan Academy 603 01:32
Adding and subtracting negative number examples Khan Academy 597 04:06
Example: Adding integers with different signs Khan Academy 584 05:31
Example: Adding negative numbers Khan Academy 621 05:40
