有理数运算是初中数学最基础的运算,由于刚刚进入初中的学生对代数的了解和理解比较肤浅,在运算的过程中会出现这样或那样的问题,如运算步骤较繁、速度过慢、准确性较差等.为了有效地解决这些问题,有必要掌握一些有理数运算的方法和技巧. Rational number arithmetic is the most basic arithmetic of junior high school mathematics. Since the students just entering the junior high school understand and understand the algebra relatively superficially, one or more problems occur during the operation, such as complicated operation steps, too slow speed and accuracy Poor, etc. In order to effectively solve these problems, it is necessary to master some methods and techniques of rational numbers.