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1、北师大版小学五年级上册数学?找质数?教案|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 1 页，共 4 页第 2 页北师大版小学五年级上册数学?找质数?教案教学内容：课本第 11 页上的内容。教学目标：1、通过找因数，观察它们的特点，初步理解质数和合数的含义。2、培养孩子的观察、比拟、抽象、概括能力，通过探索找出寻找质数的简单的方法。3、使学生初步认识数学与人类生活的密切联系，体验数学活动充满着探索与创造。教学重点：在教学活动中，帮助学生理解质数和合数的意义。教学难点：培养孩子的观察，通过探索找出寻找质数的简单的方法。教具准备：投影仪、小正方形纸
2、片等。教学过程：一、揭示课题1、先复习自然数按能不能被2 整除的分类。2、教师引入：同学们已经学习并掌握了找因数的方法，这一节课，我们再一起学习找质数。板书课题：找质数。|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 2 页，共 4 页文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 Z
3、L5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6
4、W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档
5、编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8
6、M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7
7、A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3
8、Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V1
9、0S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9第 3 页二、组织活动，探索新知。活动：拼一拼1、用 12 个小正方形拼成长方形，看谁拼的方法多，动作还快。同桌用 12 个小正方形拼长方形，可以合作，并完成书第10 页的表格。2、学生汇报，教师填表投影出示下表小正方形个数n 拼成的长方形种数 n 的因数1让学生观察左表中各数的因数，看看有什么发现？2结合上面的发现，将212 各数分为两类，说一说这两类数分别有什么特点。3、教师提示质数和合数的意义。一个数只有1 和它本身两个因数，这个数叫做质数；一个数除了 1 和它本身以外还有
10、别的因数，这个数叫做合数。4、教师：1 是质数还是合数呢？1 既不是质数，也不是合数。三、稳固练习做一做1、在 1 4 7 10 11 15 17 18 21这些数中，哪些是质数？哪些是合数？2、完成课件练一练1、2 题四、总结。通过今天这节课的学习，你有什么收获？你还有什么要问|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 3 页，共 4 页文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI
11、3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V
12、10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10
13、ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z
14、6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文
15、档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ
16、8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F
17、7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9第 4 页的？五、作业。优化作业|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 4 页，共 4 页文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10
18、 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6
19、Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9
20、文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:CJ8M2Z6F7A8 HI3Z3I6V10S10 ZL5J6Z6W4N9文档编码:C
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