The mathematics unit is presented to assist apprentices to acquire a general knowledge of mathematic skills. The unit consists of nine modules: (1) basic addition, subtraction, multiplication, and division; (2) conventional linear measure; (3) using the metric system, (4) steps to take in solving problems, (5) how to calculate areas and volumes, (6) basic principles of algebra, (7) finance--how to compute wages, payroll deductions, interest rates, and business expenses, (8) statistics and graphs, and (9) how to use the slide rule. Each module contains information on the following areas: objectives, references (textbooks), content, instructional suggestions, and background information. (EC)