论文部分内容阅读
教学片断一:铺垫理解师(出示13、35、34):怎么理解这些分数的意义?怎么用除法算式来表示它们的意义?生1:把单位“1”平均分为3份,表示这样的1份就是13,用除法来表示就是1÷3,除法的结果可以用小数来表示。……师:几个几分之一就表示成几分之几。师(出示16米、79吨):怎么理解这两个分数的意义?和之前的分数比有什么区别?生2:这两个分数表示的是数量,而不是比率。16米表
How to use the division formula to express their meaning? Health 1: The unit “1 ” is divided equally into 3, said This is a 13 is divided by the division that is 1 ÷ 3, the division of the results can be expressed in decimal. ... Division: a few a few means that a fraction. Teacher (Show 16 meters, 79 tons): How to understand the meaning of these two scores? And the previous score than any difference? Health 2: These two scores is the number, rather than the ratio. 16 meters table