在小学数学中,学具是帮助学生学习知识的辅助工具.任何一种学具都具有直观性和自控性.所谓直观性是指学具能把数量之间的关系,能把各种几何形体的特征直接呈现出来,使它们变为可以看得见、摸得清的实体,有助于建立概念的表象.所谓自控性是指学具完全由学生自己 In primary school mathematics, learning tools is to help students learn the knowledge of ancillary tools.Either kind of learning tools are intuitive and self-control.The so-called intuitive refers to the relationship between the number of instruments that can put a variety of geometry The characteristics of the direct presentation, so that they can become visible, clear entities, contribute to the establishment of the concept of the image of the so-called self-control refers to the learning by the students themselves