2022年人教版数学七年级上册1.5.3《近似数》word导学案 .pdf

名师精编优秀教案近似数名师精编优秀教案课题：1.5.3 近似数序号：17 学习目标：1、知识和技能：1、理解精确度的意义2、准确第说出精确位及按要求进行四舍五入取近似数2、过程和方法：探索按要求取近似数的方法3、情感、态度、价值观：体会近似数的意义及在生活中的作用.学习重点：按 要求取近似数学习难点：有效数字概念的理解导学方法：课时：1 个课时导学过程一、课前预习：阅读教材内容，回答下列问题1、导学案教材导读2、导学案自主测评1 二、课堂导学：1、导入我们班有47 名同学，我可以说我们班大约有50 人，大家注意到这里的50 和我们班的事迹人数还是有差别的，它是一个近似数，这节课我们就来认识近似数2、出示任务自主学习阅读教材，回答下列问题：按括号内的要求，用四舍五入法对下列各数取近似数1）0.0158（精确到0.001）2）304.35（精确到个位）3）1.804（精确到0.1）4）1.804（精确到0.01）3、合作探究导学案展题设计三、展示与反馈：展示学生答案，师生点评四、学习小结：近似数：与实际数很接近的数称为近似数五、达标检测1、课本第46 页 练习2、导学案展题设计课后作业：1、导学案深化拓展2、习题 1.5 第 6 题板书设计：文档编码:CS8W2G8J3J8 HK4T5M3G8P9 ZV8O4S10G10G10文档编码:CS8W2G8J3J8 HK4T5M3G8P9 ZV8O4S10G10G10文档编码:CS8W2G8J3J8 HK4T5M3G8P9 ZV8O4S10G10G10文档编码:CS8W2G8J3J8 HK4T5M3G8P9 ZV8O4S10G10G10文档编码:CS8W2G8J3J8 HK4T5M3G8P9 ZV8O4S10G10G10文档编码:CS8W2G8J3J8 HK4T5M3G8P9 ZV8O4S10G10G10文档编码:CS8W2G8J3J8 HK4T5M3G8P9 ZV8O4S10G10G10文档编码:CS8W2G8J3J8 HK4T5M3G8P9 ZV8O4S10G10G10文档编码:CS8W2G8J3J8 HK4T5M3G8P9 ZV8O4S10G10G10文档编码:CS8W2G8J3J8 HK4T5M3G8P9 ZV8O4S10G10G10文档编码:CS8W2G8J3J8 HK4T5M3G8P9 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