诊断性练习,是为了检查学生的知识缺漏而设计的一种练习。诊断性练习的特点,主要是分步较为详细,检查的知识点较为全面,便于查出学生在哪一步出问题,从而有针对性地进行辅导。诊断性练习可分为局部性问题诊断和全面性问题诊断。一、练习题的设计分数乘法“解决问题”部份的教学要求有二:一 Diagnostic exercise is an exercise designed to check for students’ lack of knowledge. The characteristics of diagnostic exercises, mainly step by step more detailed, check the knowledge point is more comprehensive, easy to find out where the students go wrong, so as to conduct targeted counseling. Diagnostic exercises can be divided into localized problems diagnosis and comprehensive diagnosis of problems. First, the practice of the design of fractional multiplication “problem solving ” part of the teaching requirements are two: one