“乘法分配律”中的结语多,运用广,是小学数学教学中比较重要的基础知识,学生难于掌握,有必要单独安排一堂复习课.为使学生在复习中能颇有兴趣地温故知新,并能使智能得到开发,我们必须精心设计习题,安排复习层次,让学生边练边复习,边解边思考,从练习、思考中获得兴趣.现将这节课的习题分五个层次安排如下. “Multiplication Distribution Law ” in the conclusion, the use of wide, primary mathematics teaching is the more important basic knowledge, difficult for students to master, it is necessary to arrange a separate review class.In order to enable students in the review can be interesting to know , And can make intelligent development, we must carefully design exercises, arrange review levels, so that students practice edge review, while solving thinking, from practice, thinking of interest. Now the class exercises in five levels as follows.