2021年北师大版三年级数学上册《花边有多长》教案.pdf

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1、北师大版三年级数学上册?花边有多长?教案|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 1 页，共 3 页第 2 页北师大版三年级数学上册?花边有多长?教案北师大版小学一年级上册数学教案，依据教材文章选择优质教学设计及优质教案，为你提供全方位的优秀教案。教学目标：1.结合具体情境，探索并掌握长方形周长的计算方法。2.能正确计算长方形的周长。3.能运用长方形周长的计算方法解决实际生活中的简单问题，感受数学在日常生活中的应用。教学重点：1.探索并掌握长方形周长的计算方法。2.能正确计算长方形的周长。教学难点：讨论并总结长方形的周长计算方法。教学用具：

2、小黑板卷尺教学设计：一、复习1、什么叫周长？2、说说下面图形的周长。口答二、导入师：同学们，看看我们的黑板，如果想给它装饰一下，你打算怎么做？生答如果给黑板的四周贴上花边，我们需要准备多长的花边呢？也就是花边有多长呢？板书课题三、新课1、说说怎么你打算怎么量？量四条边的长，量一条长和一条宽|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 2 页，共 3 页文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 H

3、U7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3

4、P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 H

5、U7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3

6、P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 H

7、U7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3

8、P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 H

9、U7J9R4E9M1 ZB1W8Y5H3P2第 3 页师：机灵狗已经帮大家量好了黑板的长和宽。出示黑板长 34 分米，宽 12 分米，花边至少长多少分米？理解至少2、学生先独立计算黑板的周长，再和小组同学交流算法。3、集体汇报。34+12+34+12=92分米342+122=92分米34+122=92分米师指出这些都是求长方形周长的方法，你喜欢哪种方法？可以用自己喜欢的方法求出下面两个长方形的周长。图略三、稳固练习1、同桌合作，求课桌的周长。先测量，再计算2、师讲小白兔和小黑兔赛跑诉故事。两只兔子争论都说自己跑的路程多，请学生给评一评。谁跑的路程多白兔：长 20 米，宽 40 米 小黑兔长 4

10、0 米，宽 20 米。四、小结师：通过今天这节课的学习，你们有哪些收获?|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 3 页，共 3 页文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM5L9Q3N1O9 HU7J9R4E9M1 ZB1W8Y5H3P2文档编码:CM

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