《数学课程标准》强调:数学教学要从学生已有的生活经验出发,让学生亲身经历将实际问题抽象成数学模型并进行解释与应用的过程。由此看来,数学教学要遵循“数学源于生活、用于生活”的理念,要密切联系学生生活实际,从学生熟悉的生活情景和感兴趣的事物出发,为他们提供观察、操作、实践、探索的机 The standard of mathematics curriculum emphasizes that mathematics teaching should start from the students’ existing life experience and let students experience the process of abstracting the practical problems into mathematical models and explaining and applying them. From this, mathematics teaching should follow the idea that “mathematics is derived from life and use for life”. It is necessary to closely connect with the students ’actual life and set out from students’ familiar life situations and interesting things to provide them with observations and operations , Practice, explore the machine