“学以致用”成为新课程对数学教学的一个基本要求。《教学大纲》中明确指出:“在数学教学中,要坚持理论联系实际,增强学生用数学的意识”。数学知识来源于实践,又服务于实践,它与实际生活的联系十分密切。因此,教师要充分利用学生已有的生活经验,从生活实际中引出数学问题,让 “Learning to apply” has become a basic requirement of new curriculum for math teaching. “Syllabus” clearly states: “In mathematics teaching, we must adhere to the theory with practice, to enhance students’ awareness of mathematics.” Mathematical knowledge comes from practice, but also serves in practice, it is closely linked with the actual life. Therefore, teachers should make full use of the students’ existing life experiences to lead the mathematical problems from the real life