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一、案例以下是“求求均数”一课中的精彩一幕:镜头一师:我们班的钟榕滨同学参加学校的卡拉OK比赛时,7位评委给出的分数分别是93分、96分、89分、92分、89分、94分、92分,怎样确定她的最后得分呢?生1:把7位评委评出的分数加起来,再除以7。生2:我有不同意见。因为按比赛规则,必须去掉一个最高分和一个最低分,再算平均分。师:你们认为呢?(教室里响起一片掌声)那么按这种方法再来算算她的最后得分。
First, the case The following is the “demand average” lesson wonderful scene: A lens division: Our class Zhongrong Bin students to participate in karaoke competitions in the school, the seven judges are given points were 93 points, 96 points, 89 points, 92 points, 89 points, 94 points, 92 points. How to determine her final score? Student 1: Add up the scores of 7 judges and divide by 7. Health 2: I have different opinions. Because according to the rules of the game, you must remove a highest score and a lowest score, and then calculate the average score. Teacher: What do you think? (A round of applause in the classroom) Then count her final score in this way.