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数学源于生活,寓于生活,用于生活。《新课标》又强调“学生的数学学习内容应当是现实的、富有挑战性的。数学教学活动必须适合学生的认知水平,必须建立在学生的主观愿望和知识经验的基础之上。”因
Mathematics from life, living in life, for life. The New Curriculum Criteria also emphasize that students’ mathematics learning content should be realistic and challenging.The mathematics teaching activities must be suitable for the students’ cognitive level and must be based on the students’ subjective desire and knowledge and experience. "because