2014新苏教版五级数学上册七单元解决问题的策略教案.pdf

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1、1/8 六解决问题的策略教案目标：1、使学生经历用“一一列举”的策略解决简单实际问题的过程，能通过有条理的列举分析有关实际问题中的数量关系，并获得问题的答案。2、使学生在对解决简单实际问题过程的反思和交流中，感受“一一列举”策略的特点和价值，进一步发展思维的条理性和严密性。3、使学生进一步积累解决问题的经验，增强解决问题的策略意识，获得解决问题的成功经验，提高学好数学的信心。教案重点：能对信息进行分析，用列举法解决问题，体会多样化的解决问题的策略。教案难点：能正确运用列举法解决问题，得到解决问题的全部答案，优化解决问题的策略。教具学具：小黑板教案挂图教案课件教案课时：3 课时第 1 课时用“一

2、一列举”的策略解决问题2/8 月日教案内容：教科书 P9495 例 1 及相应的“练一练”，“练习十七”第 14 题。教案目标：1、使学生经历用列举的策略解决简单实际问题的过程，能通过不遗漏、不重复的列举找到符合要求的所有答案。2、使学生在对解决简单实际问题过程的反思和交流中，感受“一一列举”的特点和价值，进一步发展思维的条理性和严密性。3、使学生进一步积累解决问题的经验，增强解决问题的策略意识，并获得解决问题的成功体验，提高学好数学的信心。教案重点：使学生经历用列举的策略解决简单实际问题的过程，能通过不遗漏、不重复的列举找到符合要求的所有答案。教案难点：使学生在对解决问题简单实际问题过程的反

3、思和交流中，感受“一一列举”的特点和价值，进一步发展思维的条理性和严密性。教具准备：小黑板教案课件教案过程：一、谈话导入。1、回想一下，过去我们学习过哪些解决问题的策略？2、你们说到的列表、画图这两种策略都是用来整理问题中的信息，便于我们分析数量关系，最后还是通过列式计算解决问题。这节课我们学习的策略则不然，运用这种策略就能找到问题的答案，不需要再列式计算。那么这是一种什么策略呢？让我们在解决问题的过程中去体验吧。二、探究策略。1、教案例 1。王大叔在围羊圈的时候遇到了一个数学问题，他究竟碰到了什么困惑？让我们一起去看一下吧。出示例1，你愿意帮助王大叔解决困难吗？提问：从题中你找到了哪些数学信

4、息？要确定围成一个什么样的长方形，我们要考虑的什么？你是怎么想的？（知道长和宽。）怎样才能知道长方形的长和宽呢？C=2(a+b)(a+b)=C 2=222=11 知道长方形的长和宽的和是11M，你有信心把不同的围法都找到吗？把你找到的围法和你的同桌说一说吧。指名回答。大家这样有条理地表达是能够解决问题的，但是都写下来，似乎也比较麻烦，有没有更简单的方法能很好地找出所有不同的围法？（让学生发表意见，把意见统一到列表上来。）出示表格：请你把刚才所找到的所有围法都记录在表格中文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6

5、H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8

6、E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3

7、T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L

8、2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编

9、码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10

10、Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5

11、J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X33/8（学生各自填表，教师巡视，收集学生列表）出示学生表格：长方形的长 M 10 9 8 7 6 5 4 3 2 1 长方形的宽 M 1 2 3 4 5 6 7 8 9 10 提问：这两张表格有什么相同和不同的地方？要研究一共有多少种不同的围法，你认为哪张表格是正确的？为什么？通过刚才的交流和

12、对比你认为在“一一列举”时最应该注意什么呢？板书：有序这样有顺序的一个一个排列出来有什么好处？板书：不重复不遗漏小结：像这样把事件发生的可能性有条理地一一列举出来，从而找到问题答案的策略，就是我们今天要研究的策略，这种策略就是“一一列举”。板书：一一列举在大家的帮助下，王大叔知道了羊圈一共有5 种不同的围法，可这会他又在纳闷该选择哪种围法？有没有什么好的建议给王大叔？指名回答：为什么呢？根据学生回答，教师适时加入面积一栏。学生口算，教师填入面积。提问：观察长方形的长、宽和面积，你发现了什么？（周长相等的情况下，长方形的长和宽越接近，面积越大。）小结：看来有顺序的一一列举，还可以帮助我们发现隐藏

13、的数学规律。2、讨论：在以前的学习中，我们曾经运用列举的策略解决过哪些问题？（1）一组一组地写出10 可以分成几和几。（2）用 12 个边长 1 厘 M的正方形拼成不同的长方形。（3）有序地写出 3 张数字卡片能组成的所有三位数。三、巩固练习。谈话：刚才同学们表现得都不错，现在到了检验大家学习成果的时候，有信心接受挑战吗？1、做“练一练”第1 题。（1）出示题目：有一种音乐钟，每隔一段相等的时间就发出铃声。已经知道上午 9：00 9：40 10：20 和 11：00 发出铃声，那么下面哪些时刻也会发出铃声？13：00 14：40 15：40 16：00 指名读一读。（2）学生先尝试完成。（3）

14、学生独立完成后汇报交流，教师主要掌握学生一一列举时的顺序。2、做“练一练”第2 题。长方形的长 M 10 9 8 7 6 长方形的宽 M 1 2 3 4 5 文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3

15、H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1

16、 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4

17、Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9

18、 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T1

19、0T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X

20、3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X34/8 学

21、生各自做题，指名说结果（12种）。3、做“练习十七”第2 题。学生各自做题，集体交流订正。四、全课总结。今天学习解决问题的策略是什么？可以用哪些方式列举？列举时要注意什么？通过这节课的学习，我们又学会了一种新的解决问题的策略：一一列举。在用一一列举策略的同时，我们还用到了其他策略，你知道用到了哪些策略吗？（列表、画图）随着你们知识的增长，将来一定会发现更多、更妙的解决问题的策略。五、课堂作业。P97第 1、3、4题。板书设计：解决问题的策略一一列举不重复长方形的周长=22M 有顺序不遗漏长方形的长+宽=222=11M 教案后记：第 2 课时解决问题的策略列举月日教案内容：教科书 P96例 2

22、及相应的“练一练”，“练习十七”第58 题。教案目标：1、让学生继续在解决问题的过程中体验并掌握列举的策略，会用这种出策略解决一些稍复杂的实际问题。文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J

23、1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H

24、4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E

25、9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T

26、10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2

27、X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码

28、:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X35/8 2、进一步培

29、养学生思考数学问题的条理性、有序性，进一步体会解决数学问题方法的多样性、灵活性，发展学生的思维能力。3、进一步培养学生的探索意识、策略意识和合作意识，让学生进一步感受数学与现实生活的联系。教案重点：会用列举策略解决一些稍复杂的实际问题。教案难点：启发学生从不同角度分析问题，帮助学生进一步感受“一一列举”的策略特点，提高灵活运用策略解决问题的能力。教具准备：小黑板教案课件教案过程：一、导入新课。1、昨天，我们学习解决问题的策略是什么？可以用哪些方式列举？列举时要注意什么？2、这节课，我们继续学习用列举的策略来解决一些数学问题。板书：解决问题的策略列举二、教案例 2。1、出示例 2 题，指名读题。

30、题中告诉我们什么信息？要我们解决什么问题？“每两支球队比赛一场”是什么意思？（每两支球队只进行一场比赛；每支球队要分别与其他 3 支球队赛一场。）你打算用什么策略来解决这个问题？2、谈话：这道题确实可以用列举的策略来解决问题。我们知道列举时要有序。想一想，按怎样的顺序列举会不重复、不遗漏？和同学讨论一下。3、全班交流。（1）分别列举各场比赛，排一排：红黄红绿黄绿红蓝黄蓝绿蓝（2）可以通过画图列举：黄队绿队蓝队红队（3）回顾刚才解决问题的过程，你有什么体会？（列举时，可以列表；可以根据问题的特点，选择合适的列举方法；列举出全部结果后，要进行检查。）二、组织练习。文档编码:CL10Q3H1G5J1

31、 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4

32、Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9

33、 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T1

34、0T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X

35、3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:

36、CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3

37、H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X36/8 1、做“练一练”。指导学生读懂题目的意思。学生独立完成，并指名板演，集体交流算法。2、做“练习十七”第5 题。学生独立完成，做完后，指名交流。3、做“练习十一”第6 题。学生独立完成，并指名板演

38、，集体交流算法。4、做“练习十一”第7 题。学生独立完成，并指名板演，集体交流算法。四、全课总结。提问：这节课你有什么收获？还有什么不明白的地方？五、课堂作业。P98“练习十七”第 8 题。板书设计：解决问题的策略列举有序不重复不遗漏教案后记：第 3 课时解决问题的策略练习课月日教案内容：教科书 P98“练习十七”第914题。教案目标：1、巩固学生对“一一列举”方法的了解与使用，进一步掌握在具体情境中能用列举法解决实际问题。2、进一步感受使用列举法时的有序性，提高学生从不同角度分析问题的能力，提高学生灵活运用策略解决问题的能力。3、进一步发展运用数学方法解决生活问题的意识。教案重点：进一步掌握

39、在具体情境中能用列举法解决实际问题。文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9

40、ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10

41、T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3

42、文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:C

43、L10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H

44、1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1

45、HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X37/8 教案难点：学生灵活运用策略解决问题的能力的培养。教具准备：小黑板 教案课件教案过程：一、组织练习。1、做“练习十七”第9 题

46、。学生独立练习，老师巡视给予指导。全班交流：9+4+1=14（个）2、做“练习十七”第10 题。指名读题。学生在书上列表找出答案，请你圈出第一次同时发车的时间。全班交流。（第一次同时发车的时间是6：40）3、做“练习十七”第11 题。学生读题后，问：这题的什么是不变的？（长方形的面积）也就是什么不变？（长乘宽的积都是等于48。）怎么才能做到有序思考？（从宽是1 开始依次考虑）学生填写表格，检查所填的情况。在填对 5 种情况后，学生分别算出周长，指名交流。指出：（1）面积一样的时候，周长不一定相等。其中宽是1 的时候周长最大。（2）表格中如果有多余的格子，一般要用线划掉，不要空着。4、做“练习十

47、七”第12 题。学生独立练习后全班交流。5、做“练习十七”第13 题。学生读题，说明题意。2 人一组合作完成，在书上画线完成。指名说说解题思路。（6 种）6、做“练习十七”第14 题。同桌合作，每人拿出一张，一共有多少种不同的那法？二、全课总结。提问：这节课你有什么收获？还有什么不明白的地方？三、课外作业。补充题。1、如果 3ab=20，有几种可能性？（怎样有序思考？依次写一写。）2、用 20M长的栅栏围长方形，有多少种可能性？如果有一面是墙的呢？板书设计：练习十七列举画图教案后记：文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G

48、5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG

49、6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D

50、8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG3T10T8L2X3文档编码:CL10Q3H1G5J1 HG6H4Y1D8E9 ZG