分式通分是异分母分式加减运算的主要步骤,其方法灵活,技巧性强.对于一些特殊且较复杂的分式,若不加分析地按常规方法一次性通分,往往运算比较繁杂,且容易造成错误.若注意观察各分式分母、分子的特点,充分发挥其特殊性,采取一些特殊的处理方法和解题技巧,则可化繁为简,化难为易,下面通过举例介绍通分的一些技巧和方法. Fractional pass-through is the main step of addition and subtraction of different denominal fractions, and its method is flexible and skillful. For some special and complicated fractions, if the analytical method is used to pass through the routine method once, the computation is often compared. It is complicated and prone to errors. If you observe the characteristics of each fractional denominator and molecule, give full play to its particularity, and adopt some special treatment methods and problem-solving techniques, you can simplify things and make things difficult. Here’s an example. Introduce some tips and methods of pass points.