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  1. 數學➊ ​ 分數分母分子公因數 6/8=3/4。➋ ​ 分母分子公因式(x²-1)​/(x-1)​=x+1。

reduced fraction (e.g. one half for three sixths)​, to reduce a fraction by canceling common factors in the numerator and denominator
Abkürzung (S)​, abkürzen (V)​