Expressions/Variables/Replacing Letters with Numbers
KHAN Academy! Watch the intro videos to order of operations and try the examples!
Khan Academy Videos Writing Expressions
Khan Academy Videos MORE Writing Expressions
Don't know where to start? Here's a good place to learn all about the order and practice!
Play Math Man and practice your order of operations!
Who wants to be a millionaire ... order of operations style!
Practice at any skill level at XP Math!
Addition and Subtraction Equations
Multiplication and Division Equations
Khan Academy Solving Equations
Khan Academy Applications of Equations
AlGeBrA MeLtDoWn!-- Help the crazy scientist in this game!
Beat the clock and solve addition or subtraction equations.
Need help modeling equations? Here's a great a site to model and solve equations!
Hoot Shot with Multiplication and Division
Math-Play-- A Whole Website of Equation Games :)