2022年一年级数学下册全册教案 .pdf

《2022年一年级数学下册全册教案 .pdf》由会员分享，可在线阅读，更多相关《2022年一年级数学下册全册教案 .pdf（17页珍藏版）》请在淘文阁 - 分享文档赚钱的网站上搜索。

1、第一单元认识图形（二）第一课时：认识平面图形总课时数：授课时间：教学目标：1通过拼、摆、画各种图形，使学生直观感受各种图形的特征。2培养学生初步的观察能力、动手操作能力和用数学交流的能力。3能辨认各种图形，并能把这些图形分类。教学重点：初步认识长方形、正方形、圆形和三角形的实物与图形。教学难点：初步认识长方形、正方形、圆形和三角形的实物与图形。教学准备：图形卡纸、实物、学具等。教学过程：一、复习，探究新知：1.小朋友们还记得这些图形朋友吗？（长方体正方体球圆柱）2.你能把这些图形平平的面画下来吗？学生在纸上画一画3.你们画下的图形有什么特点？学生小组讨论并且小组小结最后派代表全班交流不同点：共

2、同点：长方形对边相等 4 个角都是直直的平面的正方形4边相等4个角都是直直的不断开的圆没有角即封闭的）三角形有三条边三个角二、巩固发展：1说一说，你身边哪些物体的面是你学过的图形？2用圆、正方形、长方形、三角形画一画自己喜欢的图形？小组内评一评，各小组展示作品。3练习一第 1 题请小朋友涂一涂圆、正方形、长方形、三角形知道各涂什么颜色吗？小组讨论合作，反馈汇报哪些涂成黄色，哪些涂成蓝色，哪些涂成紫色，哪些涂成红色？4用圆、正方形、长方形、三角形拼一拼图形。同桌合作比一比哪一桌拼的最好？全班交流展示。5第 2 题：数一数有几个圆、正方形、长方形、三角形？独立完成，说说你是怎么数的？有什么好方法？

3、小结方法。三、提高练习：取长方形纸一张，对折再对折取正方形纸一张，对折再对折取正方形纸一张，对角折再对角折观察结果四、总结：今天你们学到了什么？长方形、正方形、三角形、圆个有什么特点？你有什么想问的？板书设计：作业设计：课后记：第二课时：拼一拼总课时数：授课时间：教学目标：1通过观察、操作，使学生体会所学平面图形的特征，并能用自己的语言描述长方形、正方形的边的特征。2通过观察、操作，使学生初步感知所学图形之间的关系。3通过学生大量拼摆图形，发现图形可由简单到复杂的变化及联系，感受图形美。4通过数学活动，培养学生用数学进行交流、合作探究和创新的意识。教学重难点：体会所学平面图形的特征，能用自己的

4、语言描述长方形、正方形的边的特征。教法设计：引导观察，动手操作，体验知识的形成过程。教学过程：一、创设情境，谈话导入教师出示一个风车，并以谈话引入：同学们看，这是什么？你们喜欢风车吗？谁动手做过这样的风车？给大家介绍一下做这样的风车要用哪些东西？二、感受新知，观察比较1提问：你们说得很对，作风车的风叶要用一张正方形的纸，正方形上个学期跟我们见过面了，是个老朋友了，回忆一下，上学期除了正方形你还认识哪些图形？在这些图形中，哪些图形和正方形最相似？为什么？文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2

5、 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8

6、M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3

7、文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:C

8、K3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5

9、H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6

10、HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U

11、10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S32提问：它们都有四个角，四条边，先来看看长方形，它的四条边有什么特点？上面的边对着下面的边，这样相对的边我们把它叫做对边。3引导学生继续观察长方形的边。提问：我们能想办法证明长方形对边相等吗？生可以自由选择证明方法，如对折、测量等，并请用不同的方法的学生上台演示。（教师板书：对边相等）4引导学生观察正方形的边，

12、有什么发现？你能证明正方形的四条边都相等吗？5小朋友们真了不起，通过你的观察，动手验证了两种图形边的特点，那你能不能利用手中老师发给你的长方形的纸做一个风车呢？（全班同学动手做风车，教师给有困难的学生进行指导）说一说你在做风车的过程中发现了哪些图形？6一个简简单单的风车，就让我们发现了这么多的图形，你能试着用这些图形来拼更多的图形吗？大家来试试！三、动手实践1学生独立完成第3 页的“做一做”。2第 6 页的第 4 题。3第 6 页的第 5 题。四、小结这节课我们进行了图形的拼摆，同学们学得很投入，课下请大家留心观察生活中有哪些基本的图形拼成的图案，说不定会有更多更好的发现。板书设计：作业设计：

13、课后记：第三课时：练习课总课时数：授课时间：教学目标：1、使学生进一步认识长方形和正方形的形状以及特征。2、通过学生动手拼一拼、摆一摆七巧板，认识长方形和正方形的特征，能辨认和区别这两种物体。拼一拼对边相等文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D

14、2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I

15、8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S

16、3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:

17、CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N

18、5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6

19、 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8

20、U10B4D2 ZB2I8M5Z1S3教学重难点：认识长方体和正方体的形状以及特征教法设计：引导观察，动手操作，体验知识的形成过程。教学过程：一、复习回顾1、长方形的特点。出示一个长方形让学生说长方形的特点。结论长方形有四条边是长长的。2、正方形的特点。出示一个正方形让学生说正方形的特点。结论正方形有四条边是方方的、正正的。二、师生互动，探究新知1、第 7 页练习一第 6 题。仔细观察，用那个物体能画出左边的图形?圈一圈。2、第 7 页练习一第 7 题。出示长方体，谁来说一说：长方体有几个面?各个面分别是什么图形？是不是长方体的每个面大小、长短都一样呢？3、第 6 页练习一第 4 题。昨天我们

21、用相同或者不同的图形，拼出了自己喜欢的图案，今天我们继续来玩拼一拼的游戏。动手。汇报。三、巩固新知第 7 页练习一第 8 题。四、课堂小结这节课你有什么收获？板书设计：作业设计：课后记：第二单元20 以内的退位减法第一课时十几减 9 总课时数：授课时间：教学目标1使学生初步学会计算十几减9。2培养学生初步的抽思象教学过程维能力。练习课文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:C

22、K3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5

23、H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6

24、HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U

25、10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2

26、 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8

27、M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3

28、文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3教学过程一、复习 1 口算。9 十 3 9 十 7 9 十 4 9 十 6 9 十 9 9 十 2 9 十 5 9 十 8 2 在括号里填上适当的数。9十()12 9 十()13 9 十()14 9 十()15 9 十()16 9 十()17 二、新授1出示教科书 P10的图。引导学生看图，提问：谁能说一说这幅图的意思?(有15 个气球，买了 9 个，还有几个?)想一想，用什么方法计算?该怎样列式?学生思考回答后，教师板书：15

29、9提问：如果没有图，要算 15 减 9 等于几，该怎样想?(学生以四人为一小组，互相商量。教师可提示学生联系旧知识进行计算。)学生汇报讨论结果，可能有以下几种情况：(1)9 加 6 得 15，15 减 9 等于 65(2)15 可以分成 9 和 6，15 减 9 等于 6；(3)10 减 9 等于 1，l 加 5 等于 6；(4)15 减 5 等于 10，再减 4 等于 6。教师对学生的不同想法，应及时给予表扬，鼓励学生多动脑筋多思考。进一步提问：这么多的想法都是对的，那么你觉得哪一种方法又快又好呢?(鼓励学生用想加算减的方法：想 9 加几得 15，15减 9 得 6)同时板书得数“6”。2小

30、朋友玩套圈游戏，投了14个圈，有 9 个没套中，套中了几个?提问：(1)要求套中了几个，该怎样列式?(学生回答后，教师板书：149)(2)得多少?怎样想的?教师板书得数“5”。3小结：今天我们学习的是什么内容?(十几减 9)教师板书课题。该怎样计算这些题目呢?教师指题，引导学生总结出想加算减的方法，同时也鼓励学生可选择自己喜爱的方法进行计算。三、巩固练习1完成教科书 P10“做一做”第 1 题。让学生在桌子上用小棒摆一摆，边操作边小声地说想的过程。然后指名说，再在方框里填上数。2完成教科书 P10“做一做”第 2 题。学生独立完成，再集体订正。3完成教科书 P10“做一做”第 3 题。学生先独

31、立完成，再任指几题，让学生说一说最喜欢用文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4

32、D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2

33、I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1

34、S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码

35、:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9

36、N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H

37、6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3什么方法计算。四、课堂练习l 完成教科书 P11练习二第 1、2 题。2布置作业。板书设计：作业设计：课后记：第二课时十几减 9

38、 的练习课总课时数：授课时间：教学目标通过十几减 9 的练习，进一步理解和掌握20 以内退位减 9 的口算方法，提高计算能力。教学过程一、复习填数计算，并讲一讲上下两行有什么联系?(1)9+()15(2)9+()18 15-9()18-9()(3)9+()14(4)9+()17 14-9()17-9()二、课堂练习1完成 P11页练习一的第 4 题。（1）出示画面，让学生理解题意。（2）让学生独立口算出每一个算式的答案，并将他们对号入座。（3）教师任意选择一题让学生说一说你是怎样想的。2完成 P11页练习一的第 3 题。教师将 l0、14、13、17写在黑板上，然后教师一手拿着 9 的卡片在黑

39、板上移动(不必按顺序)，卡片对着十几就算十几减 9。教师还可以随意在黑板上指题，全班每一个学生举数字卡片表示得数，这样能激发学生做题的兴趣，有利于提高学习的效果。3完成 P12页练习一的第 6 题。(1)出示题目让学生理解题意，口头叙述画面内容。文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V

40、9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10

41、H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6

42、Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B

43、4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB

44、2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z

45、1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编

46、码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3(2)提问：这道题告诉我们什么条件，要我们求什么?(3)请学生列式，并复述口算过程。4完成 P12页练习一的第 8 题。(1)让学生独立理解题意，叙述画面内容。(2)让学生通过画面内容想一想：这道题可以提什么问题?(3)学生任意选择独立完成。三、课堂练习1完成 P11页练习一的第 5 题。2完成 P12页练习一的第 7 题。学生独立完成，集体订正。3布置作业。板书设计：作业设计：课后记：第三课时十几减 8 总课时数：授课时间：教学目标1、学生初步学会计算十几减8。2、使学生通过练习，进一步理解计算退位减法的思考方法。

47、教学过程一、复习1、口算8+3=9+5=7+6=8+5=7+4=9+2=9+8=8+7=2看卡片，说出()里应填多少。9 十()16 8 十()13 9 十()15 8 十()17 31293，说一说想的过程。二、新授1出示例 2。文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H

48、6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z

49、8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4

50、D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2I8M5Z1S3文档编码:CK3V9N5H10H6 HE6Z8U10B4D2 ZB2