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由数的运算到式的运算是小学数学到初中数学的一个跨越,学生进入初中开始接触代数,必须注意以下问题,以便打好基础,为今后学习代数知识作准备. 一、认真领会概念 代数式是用基本运算符号把数、表示数的字母连接而成的式子.初学者往往对这一概念理解不清楚,表现在:①对基本运算符号理解不清.基本运算符号包括加、减、乘、除以及以后要学的乘方、开方,而等号、大于号、小于号并不是基本运算符号.②对特殊、典型的情况理解不透.代数式中约定单独一个字母或数字也是
The arithmetic-to-form operation is a leap from primary mathematics to junior mathematics. When students enter junior high school and begin to engage in algebra, they must pay attention to the following issues in order to lay a good foundation and prepare for the future to learn algebraic knowledge. First, conscientiously understand that the concept algebraic formula is Using basic arithmetic symbols to connect numbers and letters representing numbers. Beginners often do not understand this concept clearly. They are expressed as follows: 1 The basic operational symbols are not clearly understood. Basic arithmetic symbols include addition, subtraction, and multiplication. In addition to, and in addition to, and later to learn power, prescribing, and equal sign, greater than, less than the number is not a basic operation symbol. 2 for a special, typical understanding of the situation is not transparent. Algebra formula is also agreed to a single letter or number is also