Wyzant
Wyzant: What Is Simplifying?
This site from WyzAnt explores what simplifying is, as well as how to simplify a variety of algebraic equations. Content focuses on simplifying multiple signs, combining like terms, simplifying multiplication, distributing a number or...
Khan Academy
Khan Academy: Signs of Expressions Challenge
Practice finding the signs of the answers to complex multiplication and division problems involving exponents. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Scientific Notation Challenge
Practice solving more challenging problems involving scientific notation. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.