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在学生学习了长方体、正方体和圆柱的体积计算以后,不少教师在复习课中启发学生发现这三个公式之间的共性,并在此基础上给出了统一的柱体体积公式:V柱体=S底·h。这样做,无论对基础知识的归类巩固或对学生能力的培养提高,都有着积极的意义。但可惜一部分教师对柱体这一概念却作了不恰当的解释,以致造成了知识性的错误。笔者拟就此谈一点粗浅的看法。在小学教材中找不到
After the students studied the cuboid, cuboid and cylinder volume calculation, many teachers in the review class inspired students to discover the commonness between the three formulas, and on this basis, gave a uniform column volume formula: V column Body = S bottom h. In doing so, it has a positive meaning whether it is the consolidation of basic knowledge or the cultivation of students' abilities. Unfortunately, however, some teachers did not properly interpret the concept of cylinder, resulting in a knowledge-based error. I intend to talk about this superficial view. Not found in primary school textbooks