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