一、注意区别“约分”和“抵消”这两个不同的概念。“约分”是指用除法约去分式分子、分母的公因式,而“抵消”是指用加减法把整式中系数互为相反数的同类项合并。二、注意搞清何种分式可以约分,如何进行约分。1.如果分式的分子、分母都是几个因式的积的形式,就约去分子、分母 First, pay attention to the difference between the “about” and “offset” two different concepts. “About the division” refers to the common factor of the denominator and the denominator. The “offset” refers to the merger of the same kind of terms in the integer equation by the addition and subtraction. Second, pay attention to find out what fractions can be divided, and how to make an appointment. 1. If the numerator and denominator of the fractional formula are the product of several factors, then the numerator and denominator