论文部分内容阅读
【课前慎思】学什么:进一步认识平均数及其实际意义;会用平均数的知识解释简单生活现象、解决简单实际问题。已有经验:能用自己的语言解释平均数,如:平均数是多个数据综合起来的平均值;是两个或两个以上的数相加,然后除以这几个数的个数,结果就是平均数;把各个数据加起来,再除以各个数据的数量,得下的就是平均数;把几个东西加起来除以这几个东西的数量得到的数就是平均数;把所有的数都移补成一个相同的数,那个数叫平均数;比如5个数,这5个数加起来,再除以5,就是这5个数的平均数;画图解释等。会计算平均数。
Learn before class】 【what to learn: to further understand the average and its practical significance; will use average knowledge to explain simple life phenomena, to solve simple and practical problems. Have experience: Can explain the average in their own language, such as: average is the average of multiple data together; is the sum of two or more, and then divided by the number of these several, The result is the average; add up the data, and then divided by the number of each data, is the average; the number of things divided by the number of these things is the average; the number of all The numbers are all shifted to the same number, which is called the average; for example, five numbers, the five numbers add up, divided by five, is the average of these five numbers; Will calculate the average.