A detailed example is used to demonstrate the difference between the commutative and associative properties of addition.

Score goals as you answer questions about the properties of addition.

A nice tutorial on using the addition property of equality. Provides 4 different example problems that are worked through step-by-step and also provides some practice problems.

College professor Dan Bach offers a review of various basic topics in arithmetic, pre-algebra, and algebra. Order of operations, exponents, square roots, variables, and combining terms are just a few of the many topics covered.

Sixth graders work with the concept of equality and balance to solve one and two-step algebraic equations.