This workbook was designed as an easy-to-read, slower-paced text for students who have learning, reading, and language problems. As one of five workbooks to aid low achievers in problem solving, it focuses on how to use calculators to perform the computation required to solve mathematical problems. Using calculators as an aid to computation can free students to focus on the conceptual aspects of solving word problems. Questions within the text repeatedly involve the students' attention, and their learning is checked and reviewed within each lesson. Word problem situations reflect mathematical problems that students might actually meet. Worksheets to accompany the workbook are available in the teacher's guide. The six units in the workbook are entitled: Get to Know Your Calculator, How to Talk to Your Calculator, Check Yourself!, Decimals, Fractions and the Memory Keys, and The Percent Key. A page on Calculator Reminders, with specific keystrokes listed for seven processes, is also included. (MNS)