This site is devoted to common algebra errors made by many people. Each error is presented as part of a problem – see if you can find it!
Errors By Type
Collecting Like Terms
Order of Operations
Distributive Property
Negative Signs and Parentheses
Applying the Distributive Property
Fractions
Simplifying Algebraic Fractions #1
Simplifying Algebraic Fractions #2
Absolute Value
Exponents
Sums and Products with Exponents
Math Problems With Mistakes 