This 460-page hard-cover textbook is designed to provide practice in computation skills for students who have not mastered these skills at earlier levels. The material seems appropriate for students in grades 7 through 12 and in adult basic education classes. The book is divided into 11 chapters focusing on the following skills and areas: numbers and numeration; addition of whole numbers; subtraction of whole numbers; multiplication of whole numbers; division of whole numbers; addition and subtraction of fractions; multiplication and division of fractions; decimals; ratios, proportion, and percent; measurement; and perimeter, area, and volume. In addition to explanations of the skills and exercises, each chapter includes word problems and review and chapter tests. A teacher's manual and a set of tests are available for purchase separately. MJJ, 12-76.