《数学课程标准》明确指出:“数学教学要紧密联系学生的生活情境,从学生的生活经验和已有知识出发,使学生初步感受数学与日常生活的密切联系。”“数学学习的内容应当是现实的、有意义的、富有挑战的。”“数学源于生活,又用于生活”。所以,从学生熟知、感兴趣的生活事例出发,以生活实践为依托,将生活经验数学化,促进学生的主动 “Mathematics Curriculum Standard” clearly states: “Mathematics teaching should be closely linked with students ’life situations, starting from the students’ life experience and existing knowledge so that students can feel the close connection between mathematics and daily life.” The content should be realistic, meaningful and challenging. “” Mathematics comes from life and life. " Therefore, starting from students ’familiar and interesting examples of life, relying on the practice of life, the life experiences are mathematicized to promote students’ initiative