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如何在课堂教学中恰到好处地使用图形直观,笔者现就分数除法的教学,谈谈肤浅的感受。片段一(笔者听取的一个教学片段):出示题目:小刚家九月份用水12吨,比八月份节约1/7,八月份用水多少吨?师:读题,想一想,这题的单位“1”是谁?生:九月份的用水量。师:是吗?生:八月份的用水量。师:九月份比几月份节约1/7,几月份就是单位“1”呀!所以,单位“1”是什么?生:(似懂非懂)八月份的用水量师.现在我们观察线段图,通过线段图来寻找解决问题
How to use graphics intuitively right in the classroom teaching, the author is now on the division of teaching, talk about superficial feelings. Fragment one (the author listens to a teaching fragment): Show topic: Xiaogang September water 12 tons, saving 1/7 than in August, how many tons of water in August Teacher: Read the title, think about it, the title of the unit “1 ” Who is born: September’s water consumption. Teacher: is it? Health: water consumption in August. Teacher: September saves 1 / 7th of a month, which is the unit “1 ” in months! So what is the unit “1 ”? We observe the line graph, through the line graph to find the solution to the problem