教学过程: 上课伊始,我捧着玻璃茶杯进了教室。 师:同学们,通过前面的学习,我们了解了分数的意义。大家都能判断出一个图形中的阴影部分占这个图形的几分之几了。可是,生活中的问题却不像书本上的问题那样直接和简单,比如说老师的杯子里有一些水,这些水占整个杯子的1/2吗?(注;这只茶杯是圆柱体形状的) Teaching process: At the beginning of class, I held a glass teacup into the classroom. Teacher: Students, through the previous study, we understand the meaning of the score. Everyone can figure out how many shades of a figure make up the graph. However, the problems in life are not as direct and simple as the problems in books. For example, the teacher's cup contains some water, which accounts for 1/2 of the whole cup. (Note: This teacup is cylindrical )