代数知识是在算术知识的基础上发展起 来的．用字母表示数和数量关系是代数的重 要特点。代数使数的概念及其运算法则抽象 化和公式化。数量关系的一般化和符号化． 超越了问题的具体情景,深刻地揭示了存在 的某一类问题的共同性和普遍性,把数学认 识提高到了一个新的水平。 Algebraic knowledge is developed on the basis of arithmetic knowledge. The use of letters to represent the relationship between numbers and quantities is an important feature of algebra. The concepts of algebraic numbers and their algorithms are abstracted and formulated. Generalization and symbolization of quantity relations. Beyond the specific situation of the problem, it profoundly reveals the commonness and universality of certain types of problems that exist, and raises mathematics recognition to a new level.