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【案例】“百分数的意义”课始,老师拿着一个沙包,满怀激情地说:“同学们,这是什么?”“沙包!”学生不知老师葫芦里卖的什么药,“像这样往小桶里掷沙包,你会吗?”“会!”学生齐答。“那,让我们现在就来玩一个掷沙包的游戏好吗?”学生的兴趣特别高。玩,谁不会呀,不等老师安排,学生已经争先恐后了,结果老师点了两名学生代表甲乙两大组上台。比赛开始了,第一次:在规定的时间内,一共11个沙包,哪个小组
[Case] “the meaning of the percentage of” class, the teacher took a sandbag, passionately said: “students, what is this? ” “Sandbags! ” Students do not know what the teacher gourd “” “!” Students Qi answer. “Well, let’s play a sandbag game right now? ” The students’ interest is particularly high. Play, who will not ah, ranging from the teacher arrangement, the students have vied with one another, the results of the teacher point two students on behalf of the two groups A and B came to power. The game began, the first time: a total of 11 sandbags, which group within the stipulated time