Practice plugging in a value for the variable in an equation. These are introductory problems, so the expressions aren't too complicated.

Practice writing basic algebraic expressions to match verbal descriptions of mathematical operations.

Practice evaluating expressions in two variables by plugging in values for the variables. 

Practice plugging in values to evaluate real-world algebraic expressions. These are introductory problems, so the expressions aren't too complicated.

Practice evaluating expressions in two variables by plugging in values for the variables. These problems include some fractions and decimals.

Find the lcm (least common multiple) of pairs of integers.

Find the greatest common factor of 2 or 3 integers.

Solve word problems where you either need to find the GCF or LCM.

Factor expressions like 3x-9 by applying the distributive property. (All expressions in this exercise are linear binomials.)

Simplify algebraic expressions by combining like terms.

Practice determining whether or not two algebraic expressions are equivalent by manipulating the expressions. These problems require you to combine like terms and apply the distributive property.