Ten review lessons in basic mathematics are presented in this workbook designed for electrical apprentices and vocational students. The lesson topics are numbers (whole, positive, negative), fractions, decimal fractions, finding common denominators, reciprocals, percentage, powers and square roots, ratio and proportion, the circle and its use of formulas, and negative exponents. Each lesson generally consists of an information sheet, which explains the mathematical operation and gives examples of some problems, and worksheets of problems to be solved by the student. (JH)