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方程与代数式是初中代数中的两个重要概念.我们只有理解并掌握它们的区别和联系,才能为今后学习不等式和函数打下基础.首先看看它们的不同点. 1.概念不同:方程是指含有未知数的等式;代数式是指用运算符号把数或表示数的字母连接而成的式子.因此,代数式可以不含字母.如3是代数式;方程两边的代数式,不能都不含字母,如3=3就不是方程.
Equations and algebraic equations are two important concepts in junior high school algebra. We must understand and grasp their differences and connections in order to lay the groundwork for learning inequalities and functions in the future. Let us first look at their differences. 1. Different concepts: Equation refers to Equations that contain unknowns; algebraic expressions are equations that use operators to connect numbers or letters that represent numbers. Therefore, algebraic expressions can contain no letters. If 3 is an algebraic expression, algebraic expressions on both sides of the equation cannot contain letters. If 3=3 it is not an equation.