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1、学习必备欢迎下载100以内数的不进位加法教学设计教学内容：教科书第 4549 页，两位数加两位数（不进位）教学目标：1、在具体情境中，进一步体会加法的意义，感受计算与生活的联系。2、探索并掌握两位数加两位数（不进位）的计算方法，体会算法的多样化。3、培养提出、解决简单问题的意识和能力。教学过程：一、谈话导入师：同学们，你们喜欢大海吗？喜欢到海边玩吗？那我们就去海边看一看！生：喜欢二、情景创设（出示课件：出示课本主题图）教师引导学生观察画面。师：你发现了什么?（引导学生能按照一定的顺序观察、描述）生 1：天空中有海鸥；有小朋友有的捉虾、有的捉螃蟹；沙滩上有螃蟹生 2：女孩捉了 11 只螃蟹，男孩
2、捉了23 只生 3：女孩捉了 12 只虾，男孩捉了 26 只学习必备欢迎下载师：你能提出什么数学问题？生 1：一共捉了多少只虾?生 2：一共捉了多少只螃蟹？（如果学生提出的问题是直接可以数出来的，可以学生数一数，立即解决）三、师生共同探究（出示课件）（一）、一共捉了多少只虾？1、师：你能解决刚才我们提出的“一共捉了多少只虾”这个问题吗？自己试一试。（学生利用已有的加法经验，想一想，算一算。）（学生先进行独立探索。在讨论中能够探索出多种方法。）2、师:同学们请和你的同桌互相的交流一下你的做法？（在同桌互相交流过程中，表达自己的想法。）（在与同学交流的过程中，有较强的合作意识，并能调理清晰的表达出
3、自己的思考过程。）3、师：谁来交流一下？（当出现有的同学用竖式计算时，让学生在黑板上板书）生 1：先算 26+10=36，再算 36+2=38。生 2：先算 20+10=30，6+2=8，再算 30+8=28生 3：用竖式文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9
4、ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U
5、9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9
6、ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U
7、9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9
8、ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U
9、9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3学习必备欢迎下载4、师：你喜欢用哪种方法来计算？（学生选择自己喜欢的方法）（二）一共捉了多少只螃蟹？1、师：刚才我们解决了“一共捉了多少只
10、虾”的问题，那你能用喜欢的方法算一算一共捉了多少只螃蟹吗？（学生独立思考）2、师：谁愿意说一说你的算法？生 1：11+23=34（只）生 2：23+11=34（只）生 3：3、如果用竖式计算，你会不会写呢？（学生独立在自己的本子上完成）四、巩固反思1、口算练习（学生在规定的时间内完成，进一步巩固两位数的加法的计算方法。）21+10=73+16=13+6=20+30=30+23=65+20=2、连一连学生独立完成后集体交流。3、知识拓展应用：文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2
11、A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 H
12、O3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2
13、A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 H
14、O3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2
15、A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 H
16、O3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2
17、A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3学习必备欢迎下载课件出示：海绵宝宝已经播了 31 集了，再播 21 集就播完了。海绵宝宝一共有多少集？学生先观察画面，再独立思考，在小组内交流解决办法。（尽可能多给学生表达的机会，在学生讲完之后适时给予评价或让学生进行评价）五、课堂总结课件出示：想想，今天你学会了哪些新知识？（学生思考回顾学习内容，能用自己的话总结学到的知识。）文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O
18、1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J
19、5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O
20、1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J
21、5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O
22、1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J
23、5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3文档编码:CM9U9Z6O1K9 HO3Y9T1V2M9 ZQ5J5B4I2A3