2019年沪教版一年级下册数学教案:《线段》

2019-08-19 17:09:00来源:网络

  (1)哪种颜色的线段更长?

  (2)有什么办法知道谁长?

  师:我们有时会受到视觉的欺骗,产生错觉,有没有办法知道它们到底谁长呢?量一量

  (媒体演示)

  2、量一量 (完成书本P50/2)

  (1)量线段(基础型)

  

\

  ( )cm( )mm

  (2)量线段(提高型)

  ( )cm ( )cm

  

\

  ( )cm

  师:量了几次?

  (3)量图形

  A、长方形:

  

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  师:你发现了什么?猜一猜左边的边长是多少?这里藏着什么小秘密?

  B、三角形

  

\

  师:谁能告诉老师三条边一共长多少厘米?

  四、画线段

  1、 画随意长的线段

  (1)自己试一试

  (2)师生演示

  2、画指定长度线段

  师:画一条3厘米长的线段。

  (1)独立画

  (2)和同桌交流画法

  (媒体演示)

  五、全课总结

  六、检测目标达成练习

  师:通过这节课的学习,你有哪些收获?还想知道什么?

  画一条长3厘米6毫米的线段。

  板书设计

  线段

  直的

  有两个端点

  教学反思

  以上是《2019年沪教版一年级下册数学教案:<线段>》的内容,更多沪教版一年级下册小学教学教案请关注新东方在线小学网。


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