数学经验是学习的起点。《数学课程标准》指出“:数学教学活动必须建立在学生已有的认知发展水平和已有的知识经验的基础上,教学中要创设与生活环境知识背景密切相关的,又是学生感兴趣的学习情景,让学生在观察、操作、猜测、交流、反思等活动中逐步体会数学知识的产生、形成和发展的过程,获取积极的情感体验,感受数学的力量,同时 Mathematical experience is the starting point for learning. ”Mathematical Curriculum Standards“ states: ”Mathematics teaching activities must be based on the level of cognitive development of students and the existing knowledge and experience based on the creation of teaching and living environment is closely related to the background of knowledge, but also a sense of student Interesting learning scenarios enable students to gradually understand the process of generation, formation and development of mathematical knowledge in observing, manipulating, guessing, communicating, reflecting and other activities, gaining a positive emotional experience and feeling the power of mathematics, meanwhile