Operations with Integers
Operations with integers--Should be able to do these WITHOUT a calculator.
For a refresher on adding and subtracting with signed numbers, see
https://www.khanacademy.org/math/arithmetic/absolute-value/adding_subtracting_negatives/v/adding-integers-with-different-signs
For a refresher on multiplying and dividing with signed number see
https://www.khanacademy.org/math/arithmetic/absolute-value/mult_div_negatives/v/multiplying-positive-and-negative-numbers