在一节认识分数的课堂上,当教师反复强调“分母不能为零,否则无意义”时,有学生不服气了,问“为什么分母不可以为零?为什么无意义?”,这位教师当时也不知道如何回答,因为这个问题就是这么规定的,从上小学时候就已经知道了.后来这位同学陈述了自己的观点:“一个饼平均分成了八份 When a teacher repeatedly emphasized that “the denominator can not be zero, otherwise it is meaningless,” some students are unconvinced and ask, “Why is the denominator not zero and why is it meaningless?” The teacher also Do not know how to answer, because the problem is so stipulated, since the elementary school already know.Then the classmate stated his point: "a cake is divided into eight