《数学课程标准》指出:数学教学,要紧密联系学生的生活实际,从学生的生活经验和已有知识出发,创设生动有趣的情境。教学情境,是学生参与学习的具体的现实环境。生动有趣的教学情境,是激励学生主动参与学习的重要保证,是教学过程中的一个重要环节。一个好的教学情境可以沟通教师与学生的 The standard of mathematics curriculum points out: In mathematics teaching, it is necessary to closely relate with students ’actual life, starting from students’ life experience and existing knowledge, and creating vivid and interesting situations. Teaching situation is a concrete realistic environment for students to participate in the study. The vivid and interesting teaching situation is an important guarantee to encourage students to take the initiative to participate in the study and is an important link in the teaching process. A good teaching situation can communicate teachers and students