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1、7 的乘法口诀教学设计课题:7 的乘法口诀教学内容:苏教版二年级数学上册第六单元例1(课本第 70 页)课时:第 1 课时学情分析:学生已经具备学习26 的乘法口诀的基础上,基本已经掌握编口诀的基本方法。教学目标:1、使学生进一步理解乘法得意义,在理解乘法口诀意义的基础上,自编 7 得乘法口诀,并熟记口诀。2、正确地运用 7 的口诀进行计算。3、在自编口诀过程中培养学生的自主学习能力,体会与同伴的交流和成功的喜悦。重点难点:理解乘法得意义,正确地运用口诀进行计算。课前准备:挂图、小三角形卡片等教学过程:一、谈话导入1、看图说出加法算式和乘法算式、口诀加法算式:乘法算式:乘法口诀:提问:“四五二
2、十”这句口诀表示什么?2、师:你能用7 个三角形摆一个像书中的小船图案吗?学生动手摆一摆,再集体展示。二、自主学习1、教学准备题。A、师:刚才小朋友都用7 个小三角形摆了一个小船,它们都是1 个几?B、师:那么每次都加1 个 7,请你把得数填在空格里。C、比一比哪些同学加得又对又快!D、教师指 14、28、42 的格子问:这里表示几个7,为什么?2、动手摆一摆。A、要求摆一条小船用了几个三角形怎样列式?板书:71=7 师:这个算式表示什么意思?你会根据这个算式编一句乘法口诀吗?学生编好后提问:这里的一、七、七分别表示什么意思呢?(学生自由发言)B、师:如果我们要摆 2 条这样的小船要几个三角形
3、?摆3 条、4 条7 条呢?你们能想办法算出来,并编出乘法口诀并完成书上填空吗?要求:小组里商量一下应该先做什么?再做什么?想想三角形不够该怎么办?3、学生探索操作,教师巡视了解学生的摆和填写情况。4、全班交流:各小组派代表发言。文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6
4、HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B
5、4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K1
6、0 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y
7、5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N
8、2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:
9、CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P
10、4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2师:2 条小船是几个7?要用多少个三角形?怎样列式?怎样编口诀?”学生回答后,教师电子卡片出示。要求:其它小组也能按照这样的方法来介绍吗?学生进行介绍,教师PPT。1 个 7 717 一七得七2 个 7 727 二七十四3 个 7 7321 三七二十一4 个 7 7428 四七二十八5 个 7 7535 五七三十五6 个 7 7642 六七四十二7 个 7 7749 七七四十九5、同学们填写得都很好,这就是我们今天学习的内容,板书:7 的乘法口诀。6、熟悉口诀A、齐读 7 的乘法口诀,引导学生观察7 的乘法口诀。并小组讨论思考:7
11、的乘法口诀中的第1 个数表示什么?第2 个数呢?最后一个数呢?7的乘法口诀一共有几句?相邻的两句口诀相差几?为什么口诀第一个数一个比一个多,而得数却一个比一个多呢?B、集体交流。C、师:怎样记住 7 的乘法口诀呢?你能很快背出来吗?请试试。生:交流方法并表演背诵。师:说说你认为哪句口诀最好记?哪句口诀最难记,怎样想办法记住文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4
12、F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 H
13、P1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4
14、R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10
15、 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5
16、E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2
17、文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:C
18、M7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2呢?D、小游戏:师生、生生对口令。如:一七()()七四十九。7、用一句乘法口诀,你还会计算另一个乘法算式吗,是哪个呢?生:三七二十一可以计算7321,还能算出 3721 小结:在乘法里,由于交换两个因数的位置,它们的积不变,因此,用一句乘法口诀可以计算两道乘法式题的积。三、巩固提高1、做教科书第 71 页上面“想一想”独立完成再集体交流,提问:观察每组题目,你发现什么?想想理由是什么?2、做教科书第 71 页上面“想想做做”1 校对时让学生
19、说说自己是怎样想的?上下有什么联系?3、完成第二题4、读口诀编乘法算式。“想想做做”第 3 题。5、口算比赛(想想做做第4 题)6、看图写算式。“想想做做第5 题”,指导学生看懂图意,正确表达思考的大致过程。四、全课总结今天这节课我们学习了7 的乘法口诀,你觉得自己学得怎么样?板书设计:7 的乘法口诀(畅言电子白板)文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q
20、6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q
21、7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10
22、K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH
23、5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z
24、6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编
25、码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2文档编码:CM7Q9P4F7Q6 HP1Q7B4R10K10 ZH5Y5E6Z6N2