前苏联教育学博士赞可夫说过,“在数学教学中不仅要培养学生分析和综合、抽象和概括等能力,而且要使学生在研究某一事物时既能坚持从一个角度看问题,又能在必要时改变看问题的角度或者同时从几个角度来看,即培养出学生思维的灵活性和创造性”。 Zakanov, a former Soviet doctor of education, said: “In mathematics teaching, we should not only cultivate students’ abilities of analysis and synthesis, abstraction and generalization, but also enable students to insist on one issue while studying something, But also change the perspective of the problem when necessary, or at the same time from several perspectives, that is, develop the flexibility and creativity of student thinking. ”