论文部分内容阅读
教学要求:认识分数的基本性质,并能应用这一性质把分数化成指定的分母而分数大小不变的分数,为以后学习分数四则运算打下良好基础。教学过程: 一、铺垫 1.学生动手分火柴棒。①把12根火柴棒子均分成2份,并说明其中的一份是总数的几分之几?数数有几根? ②再把12根火柴棒平均分成4份,取其中的2份,它占总数的几分之几?数数有几根? ③把12根火柴棒平均分成6份,取其中的3份,
Teaching Requirements: Recognition of the basic nature of scores, and the ability to use this property to the fractionalized into a specified denominator and the fractional size of the same score for the future learning scores and lay a good foundation for four operations. Teaching process: First, the bedding 1. Student points sub-match stick. ① 12 matchsticks are divided into two sticks, and explain one of the total number of the few? The number of the number of? ② And then the 12 match sticks equally divided into 4, whichever is the two, it Accounting for the total number of a few? Number of the number of?? The 12 match sticks evenly divided into 6 copies, whichever is the 3,