生活离不开数学,数学知识源于生活而最终服务于生活。《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,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,初步学会 Life can not be separated from mathematics, mathematical knowledge from life and ultimately serve life. The standard of mathematics curriculum states: "Mathematics teaching should be closely linked with students' actual life. Students should learn from their life experiences and existing knowledge to create vivid and interesting situations and guide students to conduct activities such as observation, operation, conjecture, reasoning and exchange , So that students through mathematics activities, master the basic mathematical knowledge and skills, preliminary learning