Adding/subtracting negative numbers Khan Academy 546 09:16
Negative number word problems 1 Khan Academy 540 04:21
Why subtracting a negative is equivalent to adding a positive Khan Academy 588 01:32
Adding and subtracting negative number examples Khan Academy 581 04:06
Example: Adding integers with different signs Khan Academy 569 05:31
Example: Adding negative numbers Khan Academy 606 05:40
