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《数学课程标准》指出:“数学课堂不仅要考虑数学自身的特点,更应遵循学生学习数学的心理规律,强调从学生已有的生活经验出发。数学教学活动必须建立在学生的认识发展水平和已
The standard of mathematics curriculum states: ”Mathematics classroom should not only consider the characteristics of mathematics itself, but also should follow the psychological rules of students to learn mathematics, emphasizing from students ’existing life experience .Mathematics teaching activities must be based on the level of students’ cognitive development And already