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人教版小学数学三年级下册第三单元《统计》中,安排了平均数的教学。平均数作为一个虚拟数,在统计和实际生活中有着很重要的作用和意义。平均数常用于表示统计对象的一般水平,它是描述数据集中程度的一个统计量,既可以反映一组数据的一般情况,又可以用它进行不同组数据的比较,以看出整体之间的差别。在教学中,尤其受计算过程的影响,学生理解起来容易把平均数和平均
PEP Primary School Mathematics Grade Three Volume III Unit “Statistics”, arranged for the average number of teaching. As a virtual number, the average number plays a very important role in statistics and real life. The average is often used to represent the general level of statistical objects, it is a statistical description of the degree of data concentration, both to reflect the general situation of a group of data, but also can be used to compare different sets of data to see the whole difference. In teaching, especially by the calculation process, students understand it easy to average and average