分式是初中代数的重点内容之一，运算起来综合性强，技巧性大．倘若方法不当，不仅解题过程复杂（运算量增大），而且容易出差错（加大出错率）．为了避免这两点，在分式运算中，必须注意分式的特点，寻求更简更巧的方法．下面结合具体实例归纳分式运算的几种技巧，供同学们学 Fractional is one of the key contents of junior high school algebra, and it is highly comprehensive and skillful to operate. If the method is not proper, not only the problem solving process is complicated (the amount of operations increases), but also it is easy to make mistakes (increasing the error rate). In order to avoid these two points, we must pay attention to the characteristics of fractions in fractional operations and seek simpler and more clever methods. The following section summarizes several techniques of fractional calculations for students to learn