一年级数学上册第3单元1_5的认识和加减法《第几》课件新人教版.ppt

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第几,巩固复习,1. 你能给这些数字宝宝排排队吗?2. 这些数字宝宝是按什么顺序在排队呢?,感受新知,排第,他前面有人,后面有人。,1. 仔细观察,他们是按什么顺序在排队呢? 2. 你能试着回答几个问题吗?,有人排队。,5,2,1,3,感受新知,仔细观察,这3位同学分别获得了第几名?,1,2,3,理解新知,5,5,巩固新知,(1)把左边的4只小鸟圈起来。 (2)从左边数,给第4只小鸟涂上颜色。 (3)从右边数的第1只小鸟飞走了,还剩 只小鸟。,4,巩固新知,把左边的5个 圈起来,给从左数第5个 涂上颜色。,巩固新知,第2个,第4棵,第3颗,第5张,按要求填颜色。,(从左边起涂色。),巩固新知,3,4,巩固新知,从左数, 排第 , 排第 。,5,总结,请你说一说,这节课我们学习了什么知识?,几个表示物体的数量, 第几表示一个物体的位置。,

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