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人教版《义务教育课程标准实验教科书·数学》四年级下册共有八个单元的教学内容(不包括总复习),除了“位置与方向”“数学广角”是新增加的内容外,其余均为保留内容,约占全部课时的82％。实验教材遵循体现新的教材观、教学观和学习观,处理好继承与发展的关系的原则,使这些内容的编排与呈现有了很大的变化。开展本册教学实验,首先要了解
PEP “Compulsory Education Curriculum Standard Experimental Textbook Mathematics” a total of eight units in the fourth volume of teaching content (not including the total review), except for the “location and direction” “mathematical wide-angle” is the addition of content, the other are To retain the content, accounting for about 82% of class hours. The experimental teaching materials follow the principle of embodying the new concept of teaching materials, teaching and learning, and handling the relationship between inheritance and development, which greatly changes the arrangement and presentation of these contents. To carry out this teaching experiment, we must first understand