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教学内容:上海市《九年义务教育课本·数学》四年级第一学期第44~45页。教学分析:“工作效率、工作时间和工作量”是第四单元“整数的四则运算”第一课时的内容。主要介绍了工作效率、工作时间和工作量这一日常生活中常见的数量关系;同时引入树状图,帮助学生为后续学习作好准备。正确解答一步计算应用题,对于四年级学生而言并非难事。但是如何规范、简洁地表达数量关系,学生表现情况就会
Content: Shanghai “Nine-year compulsory education textbooks · Mathematics” fourth grade first semester 44 ~ 45 pages. Teaching Analysis: “Working efficiency, working time and workload ” is the fourth unit “four arithmetic integer ” the content of the first lesson. It mainly introduces the common quantitative relationship in daily life such as work efficiency, work time and work load. At the same time, it introduces dendrogram to help students prepare for the follow-up study. Correct answer one-step calculation of application questions, for the fourth grade students is not difficult. But how to regulate, concisely express the quantitative relationship, the students will behave