数学知识来源于生活,又运用于生活,它与实际生活联系十分密切。新课标明确指出:“数学教学,要密切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,引导学生开展观察、操作、猜想、推理、交流等活动,使学生通过数学活动,掌握基本的数学知识和技能……” Mathematical knowledge comes from life, but also applied to life, it is closely linked with the actual life. The new curriculum clearly states: “Mathematics teaching should be closely linked with the students ’actual life. Based on the students’ life experiences and existing knowledge, they should create vivid and interesting situations and guide students to conduct activities such as observation, operation, conjecture, reasoning and exchange. Enable students through mathematics activities, master the basic mathematical knowledge and skills ... ... ”