Abstract
Elementary, junior high or high school students are required to understand ways of thinking against questions that involve calculation in the process of solution. Students who know formula only have to remember all formula to solve various questions and cannot have ability to apply one to similar questions.
In this study, a learning system that assists establishing ways of thinking against percentage and speed questions by intuitive understanding iterations is proposed. According to experimental results, the proposed system that puts emphasis on ways of thinking was effective to learning and its radication rather than the comparative system that puts emphasis on solution by formula.