最新北师大版三年级上册数学教案有板书设计、反思优秀名师资料.doc
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1、北师大版三年级上册数学教案(有板书设计、反思)北师大版三年级上册数学教案 第一单元、乘除法(4课时) 1、 小树有多少棵 (口算整十、整百、整千数乘一位数) 一、教学内容:P2-3 二、教学目标: 1、 探索并掌握整十、整百、整千数乘一位数的口算方法,并能正确计算。 2、 结合具体情境,在讨论解决实际问题的过程中培养学生提出问题和解决问题的意识和能力。 三、教学重、难点:掌握整十、整百、整千数乘一位数的口算方法,并能正确计算。 四、教具准备:课件 五、教学过程: (一)、创设情境,提出问题。 教师出示课件,引导学生先观察P2这幅图:你从图中看到了什么,你能 提出哪些问题,(让学生理解图意并提出
2、问题,并列出算式) (二)、探索方法。 1、小组讨论算法:让学生结合提出的问题,说一说自己列出的算式的含义, 再说计算方法。 2、全班交流:小组代表发言。教师将学生的算法写在黑板上。对正确的方 法均给予肯定。可进一步引导学生比较23=6与203=60 在学生理解算理的基础上,得出较简便的计算方法。 3、试一试: 第1题: 让学生独立列式计算,并说说是怎么想的。 第2题: Wang Department responsible for the pro-democracy movement the Han Chang Yan Tomb. He used to work, wide exposure
3、 to four rural peasants, to publicize Japanese thought, and to establish the perimeter of the party organization Jiangnan anti-Japanese guerrilla people salvation. East water village Shen Yingjie, also participated in the Organization and served as team leader. August Zhu Xi Nan Xun Kang Wang, also
4、has made a night attack bridge Japanese defenders, and the Eastern attack zhenze traitors was the puppet command, enemy steamer and seized a large quantity of firearms, ammunition, supplies and file photos of victory. That same month, Zhu Wang achieved in deqing, Wu Kang border forces also recovered
5、 three mountains (Hui shan, Shan, dry mountain) victory. In September, the second guerrilla Brigade of the Communist Party Member Wen Yongzhi as captain of Wuxing County about 150 guns, to shake off the annexation of the Wuxing County Government, and he demanded, Zhejiang Province, Lin Jie Xu knows
6、delegate to the West to lead. Decided to Jie Xu with the reputation of the identity of the Chinese Communist Party, Xu Jin talks with Zhu Xi, Zhu Bucheng Brigade of temperature programmed. Zhu Xi, agreed. Thus, cleaning party members into the Zhu Xi forces, such as Xu, Xu by superiors and sent to pa
7、rty members after all. In October, party group, Xu cleaning team leader, directly under the leadership of CPC Zhejiang Provincial Committee. Party groups actively working, restored Han chang and others from the party. Help Zhu Xi established the Department and strengthen youth service corps, the est
8、ablishment of womens team, run training courses in rotation drawn the officers and men of the Regiment, group. Strengthening the political and ideological education of officers and men, advocacy and national salvation movement aim to inspire soldiers 让学生先独立列式计算,然后反馈结果,再让学生结合题目说一说整百、乘一位数的口算方法。最后可以引导学
9、生观察比较这几组题目,找一找横行竖列算式的规律,用自己的话说说发现了什么。对于学生的发现,只要合理,教师就给予肯定和鼓励。 (三)、理解与应用:组织学生练习并引导学生运用乘法知识解决一些简单的实际问题。 1、P3上的第1、2题让学生独立完成,再集体订正。 2、P3上的第3题:先让学生看懂图,再理解题目中每一问的意思。让学生尝试独立解决问题,鼓励学生有自己的思考方法。最后,引导学生从不同的角度提出问题。 3、数学游戏:通过P3的游戏巩固整十数乘一位数的口算,激发学生的学习兴趣。 六、板书设计: 小树有多少棵 20,20,20,60(棵) 23,6 202,20,40(棵) 203,60(棵) 答
10、:小树有60棵。 七、作业:1、复习P2、 P3。 2、预习P4、 P5。 八、课后反思: 本节课创设情境,情境贯穿课堂始终,能充分地调动了孩子们的学习兴趣,能让孩子们在不知不觉中学习新知,使学生在生动具体的情境中认识和理解数学知识。 2、需要多少钱 (口算两位数乘一位数) 一、教学内容: 教科书P4-5 二、教学目标: 1、 探索并掌握两位数乘一位数的口算方法,经历多种算法的交流过程,并能正确计算。 2、 结合具体情境,能用乘法知识解决简单的实际问题,感受数学在实际生活中的运用。 三、教学重难点:掌握两位数乘一位数的口算方法,并能正确计算。 四、教具准备:课件 五、教学过程: (一)、创设情
11、景,提出问题。 Wang Department responsible for the pro-democracy movement the Han Chang Yan Tomb. He used to work, wide exposure to four rural peasants, to publicize Japanese thought, and to establish the perimeter of the party organization Jiangnan anti-Japanese guerrilla people salvation. East water vill
12、age Shen Yingjie, also participated in the Organization and served as team leader. August Zhu Xi Nan Xun Kang Wang, also has made a night attack bridge Japanese defenders, and the Eastern attack zhenze traitors was the puppet command, enemy steamer and seized a large quantity of firearms, ammunition
13、, supplies and file photos of victory. That same month, Zhu Wang achieved in deqing, Wu Kang border forces also recovered three mountains (Hui shan, Shan, dry mountain) victory. In September, the second guerrilla Brigade of the Communist Party Member Wen Yongzhi as captain of Wuxing County about 150
14、 guns, to shake off the annexation of the Wuxing County Government, and he demanded, Zhejiang Province, Lin Jie Xu knows delegate to the West to lead. Decided to Jie Xu with the reputation of the identity of the Chinese Communist Party, Xu Jin talks with Zhu Xi, Zhu Bucheng Brigade of temperature pr
15、ogrammed. Zhu Xi, agreed. Thus, cleaning party members into the Zhu Xi forces, such as Xu, Xu by superiors and sent to party members after all. In October, party group, Xu cleaning team leader, directly under the leadership of CPC Zhejiang Provincial Committee. Party groups actively working, restore
16、d Han chang and others from the party. Help Zhu Xi established the Department and strengthen youth service corps, the establishment of womens team, run training courses in rotation drawn the officers and men of the Regiment, group. Strengthening the political and ideological education of officers an
17、d men, advocacy and national salvation movement aim to inspire soldiers 教师出示课件,引导学生先观察P3这幅图:你从图中看到了什么,你能提出哪些问题,学生可能会提出很多问题,如:买一个球要多少钱,3个小朋友每人买一个泳圈要多少元,买一个泳圈和一个球需要多少钱,买3个球要多少钱,用50元可以买几个泳圈、几个球, (二)、探索口算方法。 1、 解决问题:买3个泳圈需要多少钱, ?列式计算,小组交流。 学生独立列式:123, 然后,学生尝试计算,再在小组里交流自己的口算方法。 ?全班交流算法。 教师组织全班交流计算方法,可能会出
18、现以下口算法: 生1:123就是3个12相加:12+12+12=36(元) 生2:123就是3个10 再加上3个2,103=30,23=6,30+6=36(元) 生3:如果每个球是10元,3个泳圈是30元,我每个球少算了2元,3个球还要6元,一共要36元。 生4:可把12看成43,这样123就变成了49=36(元) 生5:123=623=6(23)=66=36(元) 以上每种计算方法都是正确的,教师要对学生进行表扬和鼓励。 2、 解决问题:买3个泳圈需要多少钱, 每一个学生先独立列出乘法算式,尝试解决,再交流、汇报。 3、 引导学生说一说怎样口算两位数乘一位数。 (三)、应用知识,解决实际问题
19、。 练一练1、2 学生独立完成 练一练3 可组织学生进行讨论。 六、板书设计: 需要多少钱 1 23,36(元) 103,30 12,12,12,36 23,6 答:需要36元。 七、作业:1、第7页的2、3题。 八、课后反思: Wang Department responsible for the pro-democracy movement the Han Chang Yan Tomb. He used to work, wide exposure to four rural peasants, to publicize Japanese thought, and to establish
20、 the perimeter of the party organization Jiangnan anti-Japanese guerrilla people salvation. East water village Shen Yingjie, also participated in the Organization and served as team leader. August Zhu Xi Nan Xun Kang Wang, also has made a night attack bridge Japanese defenders, and the Eastern attac
21、k zhenze traitors was the puppet command, enemy steamer and seized a large quantity of firearms, ammunition, supplies and file photos of victory. That same month, Zhu Wang achieved in deqing, Wu Kang border forces also recovered three mountains (Hui shan, Shan, dry mountain) victory. In September, t
22、he second guerrilla Brigade of the Communist Party Member Wen Yongzhi as captain of Wuxing County about 150 guns, to shake off the annexation of the Wuxing County Government, and he demanded, Zhejiang Province, Lin Jie Xu knows delegate to the West to lead. Decided to Jie Xu with the reputation of t
23、he identity of the Chinese Communist Party, Xu Jin talks with Zhu Xi, Zhu Bucheng Brigade of temperature programmed. Zhu Xi, agreed. Thus, cleaning party members into the Zhu Xi forces, such as Xu, Xu by superiors and sent to party members after all. In October, party group, Xu cleaning team leader,
24、 directly under the leadership of CPC Zhejiang Provincial Committee. Party groups actively working, restored Han chang and others from the party. Help Zhu Xi established the Department and strengthen youth service corps, the establishment of womens team, run training courses in rotation drawn the of
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