【摘 要】
：
义务教育大纲将分数分成两个阶段进行教学。第一阶段是三年级的“初步认识”,主要借助直观,感性认识一些较简单的分数。第二阶段安排在本单元,引导学生系统学习和研究分数。
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义务教育大纲将分数分成两个阶段进行教学。第一阶段是三年级的“初步认识”,主要借助直观,感性认识一些较简单的分数。第二阶段安排在本单元,引导学生系统学习和研究分数。 与原通用教材比较,本单元教材在内容编排上作了以下一些主要调整和修改:①求一个数是另一个数的几分之几的应用题,通用教材安排在分数的意义之后,本单元将这一内容调整在分数与除法的关系之后,从求一个数是另一个数的几倍入手,是为了突出同除
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