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众所周知,同分母的分式加减法法则用式子可表示为(a/c)±(b/c)=(a±b)/c.当我们变换角度审视这个式子时,不难发现(a±b)/c=(a/c)±(b/c).它看似简单,却能在有关的解题中起到事半功倍之效.
As we all know, the fractional addition and subtraction rule of the same denominator can be expressed as (a/c)±(b/c)=(a±b)/c. It is not difficult to find when we look at this formula by changing the angle. (a ± b) / c = (a / c) ± (b / c). It seems simple, but it can play a multiplier effect in the related problem.