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统计思想不啻在求平均数应用题中渗透着,若辅以其它应用题的教学,将有助于探求中间问题,分析数量关系,优化计算方法,提高应用题的教学质量。 一、统计思想在求平均数应用题中的渗透。 在简单的求平均数应用题的教学中,着力于建立平均数的概念,使学生懂得 总数量÷总份数=平均数, 更要狠抓问题中具体的平均数实际含义的理解。比如所谓“这组同学的平均身高”指的是“这组同学的总身高”除以“这组总人数”所得的商;又如所谓“敬老院老人的平均年龄”指的是“这个敬老院老人的年龄总和”
Statistical thinking is not infiltration in the application of the average number of questions, if supplemented by other teaching applications, will help to explore the middle of the problem, analyze the relationship between quantity, optimize the calculation method, improve the quality of teaching. First, statistical ideas in the application of the average penetration problem. In the simple teaching of average application questions, we should focus on establishing the concept of averaging so that the students know the total amount ÷ the total number of copies = the average, and pay more attention to the understanding of the actual meanings of the specific averages in the question. For example, the so-called “average height of this group of students” refers to the quotient of “the total height of this classmate” divided by the “total number of people in this group”; and the so-called “average age of elderly people in nursing home homes” means “ The sum of ages ”