数学知识不仅系统性强，而且各部分之间联系密切。我们在数学教学尤其是概念教学中，应充分注意和利用学数知识的这一重要特点，启发儿童沿着知识的“纵”、“横”方向积极探索，使之置于知识的网络之中。现代认知心理学的研究表明，知 Mathematical knowledge is not only systematic, but also closely linked between the various parts. In mathematics teaching, especially in concept teaching, we should pay full attention to and use this important feature of knowledge in mathematics to inspire children to actively explore along the vertical and horizontal directions of knowledge so that they can be placed in the network of knowledge . Research on modern cognitive psychology shows that knowledge