很多小学数学老师在执教过程中都有这样一个体会,就是当遇到很多空间概念性的东西和某类抽象化的应用题时,学生往往会不知所措,难以理解。其实,这并不奇怪,学生的思维启发本就是从具体实在的物象开始的。他们习惯了利用具体可感的物象来理解数学,所以对于教师来说,怎样将抽象的概念转变为一种具象,拉近学生与新概念、新知识的距离,是我们必须面对以及研究的一大课题。变抽象为具象的常用方法有: Many primary school math teachers in the coaching process has such an experience, that is, when encountered a lot of space conceptual things and some kind of abstract application problems, students often know what to do, it is difficult to understand. In fact, this is not surprising, inspired by the students thinking is from the concrete reality of the image began. They are accustomed to using specific sensible images to understand mathematics, so how to change abstract concepts into concrete ones and narrow the distance between students and new concepts and new knowledge for teachers is that we must face and study A major issue. The abstract methods for abstracting are: