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《数学课程标准》强调:人人学有价值的数学,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;不仅要考虑数学自身的特点,更应遵循学生学习数学的认知规律,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知发展水平和
The standard of mathematics curriculum emphasizes: Everyone learns valuable mathematics, and students ’mathematics learning content should be realistic, meaningful and challenging. They should not only consider the characteristics of mathematics, but also recognize students’ recognition of mathematics Know the law, emphasizing starting from the student’s existing life experience, mathematics teaching activities must be based on the level of cognitive development of students and