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1、精品教学教案比较图形的面积教学设计教学内容：北师大版小学数学五年级上册P16-17“比较图形的面积”。教学目标：1、借助方格纸，能直接判断图形面积的大小。2、通过交流，知道比较图形面积大小的基本方法。3、体验图形形状的变化与面积大小变化的关系。教学重点：掌握比较图形面积大小的方法。会用不同的方法去比较图形的面积大小教具准备：课件、方格纸、直尺、各种平面图形的硬纸板教学方法：比较法、操作法教学过程：一、复习旧知，揭示新课。1、指名学生说出所学平面图形的名称以及特征。2、让学生拿出准备的长方形的纸。跟同桌说说哪儿是它的周长，哪儿是它的面积。并且用手比划一下这个长方形的周长有多长？用手摸一摸它的面积
2、有多大？3、出示两个大小相似的长方形，比较长方形面积的大小。4、4、揭示课题：我们今天来探究图形面积的比较。二、自主探究：比较图形面积的大小。1、出示课本 16 页网格中的 13 个图形。精品教学教案2、自主探究活动：请同学们先仔细观察，思考这些图形的面积之间可能有什么关系。师：今天我们重点探究面积相等的关系。3、学生探究图形面积的相等关系。（1）学生探究哪两个图形面积相等。学生观察猜测哪两个图形面积相等。动手操作验证两个图形面积相等。全班交流，归纳比较图形面积的方法：找到了哪些图形之间的面积大小关系？是怎么知道的？归纳学生所使用的比较方法如下：A、数方格的方法；B、重合法；（通过旋转、平移、
3、翻转等操作方法，使两个图形重叠，再观察比较出图形面积的大小）C、转化法；（通过分割、割补、拼接转化为规则的图形后，再做比较）（2）学生探究哪两个图形面积之和与第三个图形面积相等。学生观察猜测哪两个图形面积之和与第三个图形面积相等。动手操作验证哪两个图形面积之和与第三个图形面积相等。全班交流，归纳比较图形面积的方法。三、实践活动：比较图形面积的大小。1、活动一：课件出示课本17 页 1 题：师：同学们观察得很仔细，总结了这么多的比较图形面积大小的方法，那我要考考大家的眼力，下列图形中哪些与图1 的面积一样？文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编
4、码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W
5、6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J
6、2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10
7、B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3
8、N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3
9、S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I
10、2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3精品教学教案为什么？你用的是什么方法得到的？（注：重点要引导学生怎样对图形进行平移和分割，让学生体会形状变化而面积不变的事实，培养学生图形的转化思想，为后续运用转化思想学习面积公式的推导打下基础。）2、活动二：出示课本17 页的 2 题。(1)师：我们知道图
11、形形状可能不一样，但是面积大小可能一样的道理，那大家能画出相同面积但形状不一样的图形吗？(2)按题目要求在课本上画面积是12 平方厘米的不同图形。看谁画得多。作业展示。表扬有创意的同学。3、活动三：出示课本17 页的 3 题：(1)师：我们知道，把一个不规则的图形给它补上一块，就可以使它变成规则的图形，上面的这个图形应该补几号图形呢？为什么？(2)课件演示。（注：重点让学生说出自己的想法，培养学生把不规则图形可以补成规则图形的意识，为今后运用“补”的方法去求不规则图形的面积做好铺垫。）4、活动四：出示课本17 页的 4 题：(1)师：我们知道用不同的图形可以拼出不同的有意思的图形来。那 4 题
12、的两个图形可以拼成什么样的图形呢？先想想，再动手拼一拼进行验证。(2)你还能拼成什么样的图形呢？动手试一试。文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10
13、S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3
14、文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:C
15、N6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1
16、J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 H
17、S10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H
18、6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3精品教学教案作业展示，说自己拼成的什么图形？怎么想的？（注：
19、要先让学生想象可以拼成什么样的图形？再让学生动手操作，为运用分割法求组合图形面积埋下伏笔。）四、全课总结。通过这节课的学习，有什么收获和启示？板书设计:比较图形的面积平面图形面积的大小比较方法:1、重合法；2、数格子的方法；3、分割法；4、割补法；5、拼接法。文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档
20、编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6
21、W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9
22、J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS1
23、0B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V
24、3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO
25、3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3文档编码:CN6W6M1J9J2 HS10B2H6V3N3 ZO3S10S7I2C3