When solving mathematical equations, there are some pitfalls that can easily lead to mistakes, especially when dealing with equations involving fractions, parentheses, powers, and roots. To help reduce errors in classwork, there is now a learning aid that addresses these issues. It provides easy-to-understand explanations and practice problems for the most common sources of errors in equations. A mistake check at the end of each chapter assesses learning success. Fewer mistakes in classwork helps effectively reduce the number of errors.