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简单的统计(二)分统计表和统计图两节。本单元统计表的教学,是在学生已掌握统计表的形式和制法的基础上,着重引导学生绘制含有百分数的统计表。在教学统计图时,教材首先说明统计数据经过分类整理后,还可以制成统计图,然后依次说明常用统计图的特点和作用,并详细说明了制作各种统计图的步骤。 下面谈一谈单式条形统计图的教学设想。 1、介绍条形统计图的特点(微机演示) 出示一幅全校各年级人数统计图,对照统计图,教师指出条形统计图是用一个单位长度表示一定的数量(纵轴上一个单位长度依次闪烁);根据数量的多少(每个直条顶上标注的数量闪烁),画出长短不同的直条(每个直条由下
Simple statistics (two) sub-statistics and charts two sections. The unit statistics teaching, is based on the students have mastered the form and method of statistical basis, focusing on guiding students to draw a table containing the percentage. When teaching statistics chart, the teaching material first shows that after the statistics are classified and sorted, you can also make the statistical chart, then explain the characteristics and functions of the commonly used statistical chart in turn, and describe the steps of making all kinds of statistical charts in detail. Here to talk about the single bar chart teaching ideas. 1, the introduction of the characteristics of bar charts (computer demo) to produce a chart of the whole school grades, control chart, the teacher pointed out that the bar chart is a unit length that a certain number (a unit length on the vertical axis in turn Blinking); according to the number of the number (each bar at the top mark the number of flashing), draw different length of the bar (each bar from the next