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一次,笔者到某校听三年级的数学课《连乘应用题》,某教师联系本班实际很自然地引导学生编了一道两步应用题:“三(2)班有4个组,每组有6张课桌,每张课桌坐2人。一共有多少人?”教师让学生尝试列式解答完后,引导反馈解答情况:师:同学们真了不起,通过自己的努力找到了解决的方法,谁来说一说,你是怎样解决的?生:老师,我的列式是6×2=12(人),12×4=48(人)。师:你是怎么想的?生:一张课桌坐2人,每组有6张课桌,每组一共有6×2=12(人),全班有4个组,一共有4个12人,共48人。师:同意吗?
Once, I went to a school to listen to the third grade math class “even by the application of the problem,” a teacher in contact with this class is actually very natural guide students to compile a two-step application: “three (2) Each group has 6 desks and 2 people sit at each desks.A total of how many people? ”Teachers let the students try to solve the problem, guide the feedback to answer the situation: Teacher: The students are great, through their own efforts to find The solution to the problem, who said, how do you solve? Health: teacher, my column is 6 × 2 = 12 (people), 12 × 4 = 48 (people). Teacher: How do you think? Students: 2 people sitting in a desk, each group has 6 desks, each group a total of 6 × 2 = 12 (people), the class has 4 groups, a total of 4 12 people, a total of 48 people. Teacher: agree?