从 小学的算术过渡到中学的代数 ,以小学的具体数字过渡到中学的代数式 ,从小学的对几何图形的感性认识过渡到中学对几何图形的理性认识 ,都是认识上的一次质的飞跃。教学中应如何做好这种衔接呢 ,笔者以为要从如下几方面来把握。一、由小学的代数知识向中学的代数初步知识的过 The transition from elementary school mathematics to middle school algebra, the transition from elementary school figures to algebraic expressions in secondary schools, and the transition from the perceptual knowledge of geometry in elementary schools to the rational understanding of geometry in middle schools are all qualitative leaps in understanding. How should we do this connection in teaching? The author thinks that it should be grasped from the following aspects. First, from the algebra knowledge of elementary schools to the algebraic preliminary knowledge of secondary schools