Video Links if You Need Additional Help

Most of the Mastery topics from Khan Academy have short videos explaining exactly how to solve those types of problems.  Here are some links to videos for our upcoming topics:

Evaluating Expressions 2 variables:  Here's the video 

Adding & Subtracting Negative Numbers:  Video Here 

Multiplying & Dividing Negative Numbers:  Watch Here

Order of Operations:  Select from 4 videos

Distributive Property:  Here

Combining Like Terms w/ Distributive Property: Video Here

Properties of Numbers 1:  Here, and Here, and Here

Good Luck, let me know if you're having trouble with a particular topic.