练习是学生巩固所学知识,进而形成智能的重要环节。小学数学习题形式多样,从其编排目的及练习作用来看,一般可分为四大类: 一、复习性的题目。它常常将前一部分或前几部分的知识穿插安排。其作用是使学生在学习新知识的同时,不断地复习已学的知识,做到前后联系,系统掌握,同时也起着预习新知识的作用。如,讲授乘法的意义及运算定律后,安排了长方形,正方形周长 Practice is an important part of the students to consolidate their knowledge, and thus form a smart. Primary school mathematics exercises in various forms, from the purpose of its arrangement and practice point of view, can be divided into four categories: First, the review of the subject. It often arranges the knowledge of the previous part or the first few parts. Its role is to enable students to learn new knowledge at the same time, continue to review the knowledge has been learned to do before and after the contact, the system to master, but also play a preview of the role of new knowledge. For example, after explaining the meaning of multiplication and the law of operation, we arranged rectangular and square perimeters