Combining Like Terms

• Combing Like Terms – Algebra Help
• Combining Like Terms – Khan Academy
• Combining Like Terms – Purple Math
• Combining Like Terms – Learn Zillion

Algebraic Expressions and Equations

• Algebraic Expressions – Khan Academy
• Writing Algebraic Expressions – Math Goodies
• Algebraic Expressions – The Math Page
• Read and Write Algebraic Expressions– Learn Zillion
• Writing Algebraic Equations – Math Goodies
• Algebraic Equations Basics – Khan Academy
• One-Variable Linear Equations – Khan Academy
• One-Step Linear Equations – Khan Academy
• One-Step Equations – Math Playground

Properties of Real Numbers

• Properties of Real Numbers – Regents Prep
• Properties of Real Numbers – Math.com
• Real Number properties: Commutative, Associative, Inverse Property, Zero &  Distributive – Math is fun
• Real Number properties: Commutative, Associative, & Distributive – Purple Math

Combining Like Terms

• Combining Rational Number Like Terms – Khan Academy
• Combining Rational Number Like Terms With Negative Coefficients Practice  – Khan Academy
• Combining Rational Number Like Terms With Negative Coefficients Practice  – Khan Academy