《数学课程标准》指出:“学生的数学学习内容应当是现实的、有意义的、富有挑战性的。”“数学教学必须从学生熟悉的生活情景和感兴趣的事物中提供观察和操作的机会,使他们感受到数学就在身边,感受到数学的趣味和作用,对数学产生亲切感”。体现了数学源于生 The Mathematics Curriculum Standard states: “Students ’math learning content should be realistic, meaningful, and challenging.” “Math teaching must provide insight and familiarity with students’ familiar life situations and interests The opportunity to operate, so that they feel math around, feel the taste and role of mathematics, to create a sense of intimacy ”. Reflects the mathematics from students