培养初步的空间观念,是义务教育大纲规定的小学数学教学目的之一。在小学阶段,学习几何初步知识,要使学生掌握简单几何形体的特征,在此进程中,获得一些形体的形状、大小和相互位置关系的表象,从而在头脑里进行空间形体的分解与组合而形成 To cultivate the initial concept of space is one of the purposes of primary school mathematics teaching stipulated in the outline of compulsory education. In the elementary school stage, to learn the elementary knowledge of geometry, to enable students to grasp the characteristics of simple geometric shapes. In this process, some shapes, sizes, and representations of mutual positional relationships of the shapes are obtained, so as to decompose and combine spatial forms in the mind form