分式与分数都是A/B(即A÷B)的形式.分数的分子A与分母B都是整数,而分式中A、B都是整式,并且B中必含有字母.分数是分式中的字母取某些值的结果,分式更有一般性.正是分数与分式这种特殊与一般的关系,所以分式与分数有许多类似之处,有类似的变号法则,有类似的约分和通分,有类似的运算法则等等.学习分式时也是类比着分数来学的,这样一方面对分式的知识易于学习和掌握,但另一方面,若 Fractions and scores are in the form of A/B (ie, A÷B). The numerator A and the denominator B of the score are both integers, and A and B are all integers in the fraction, and B must contain letters. Scores are points. The result of using certain letters in the formula is that the fraction is more general. It is the special and general relationship between scores and fractions. So there are many similarities between fractions and fractions, and there are similar rules for changing numbers. There are similar approximating points and points, similar algorithms, etc. Learning fractions is also analogous to the scores, so that on the one hand the knowledge of fractions is easy to learn and master, but on the other hand, if