Utilizing word problems relevant to automotive mechanics, this workbook presents a concept-oriented approach to competency development in 13 areas of basic mathematics: (1) the expression of numbers as figures and words; (2) the addition, subtraction, multiplication, and division of whole numbers, fractions, and decimals; (3) scientific notation; (4) ratios and proportions; (5) percents; (6) measurement; (7) geometry; (8) the Pythagorean Theorem; (9) introductory trigonometry; (10) introductory algebra; (11) problem solving; (12) probability and statistics; and (13) graphs and charts. For each competency area, the workbook presents a series of word problems designed to reinforce student learning and to demonstrate the applicability of the concept to the automotive work environment. An answer key for the problems is appended. (JP)