四年级数学下册第1单元《四则运算》解决问题教案3新人教版.doc

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1租船问题教学目标: 1、情境创设,灵活运用有余数除法的有关知识解决生活中的简单实际问题,发展应用意识。2、在合作交流中勇于表达自己的想法,学会倾听他人的意见;通过合理解决实际问题,体会成功的喜悦。 教学重点: 发展应用意识,运用所学知识解决实际问题。 教学难点: 学会倾听,并能正确表达自己的想法。导入新课一、创设情境,导入新课 师:小朋友们,大家好!听着动听的歌曲.伴着柔和的春风!今天老师想带着同学们一起去公园划船,你们说好吗?2、主动探索,解决问题 1、出示例 5: (1)师:我们来到了租船处,在这个图中你都发现了什么信息呢? (2)现在有了这几个数学信息,老师有个问题要让大家帮着老师解决。根据这些数学信息,我们去租船吧! (出示问题) 2、解决问题分析:如果都租小船30 4=7(只)2(人)7+1=8(只)20 8=160(元)如果都租大船:30 6=5(只)35 5=175(元)全租小船,但有 1 条船只坐了 2 人,没坐满。是不是还可以再省钱呢?把这 2 人和另一条小船的 4 人都安排坐 1 条大船,还可以省钱。6 条小船:20 6=120(元)1 条大船:35 元。共花:120+35=155(元)回顾与反思:我们是怎么解决这个问题的呢?(先假设,再调整)3、 环节 巩固练习 P11 第 5 题四、课堂总结:2

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