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听了一节课,教师讲了这样一道题:“在五年级一班学生爱心捐款活动中,我班12名女生平均每人捐5元,20名男生平均每人捐5.5元。全班平均每人捐款多少元?”教师在学生出现错误时是这样引导学生的:【课堂实录】生1:(5+5.5)÷2=5.25(元)师:你能说说这样做的理由吗?生1:全班学生分男生女生两部分,把男生平均钱数加上女生的平均钱数再除以2,就可以得到全班平均每人捐款的钱数。师:你们同意他的观点吗?生:同意(一起回答)。师:我想知道这个班一共捐了多少钱,该怎么办呢?
After listening to a class, the teacher talked about such a question: “In the fifth grade class of students’ caring activities, 12 girls in our class donated an average of 5 yuan each and 20 boys donated an average of 5.5 yuan. Average number of donations per person? ”Teachers in the wrong students so is to guide students: [Class Record] Students 1: (5 + 5.5) ÷ 2 = 5.25 (yuan) Division: You can talk about the reasons for doing so Health 1: Students in the class divided into boys and girls in two parts, the average amount of money plus the average number of girls plus the average number of girls divided by 2, you can get the average class donations money per person. Teacher: Do you agree with him? Health: agree (answer together). Teacher: I want to know how much money this class has donated. What should I do?