名詞 numerator:

1. the dividend of a fraction

nu.mer.a.tor

n.（名詞）
Mathematics
【數(shù)學(xué)】
The expression written above the line in a common fraction to indicate the number of parts of the whole.
分子：寫在分?jǐn)?shù)的分?jǐn)?shù)線上的表達(dá)式，表示占整體中的比例
An expression to be divided by another; a dividend.
被除數(shù)：被另一個數(shù)除的表達(dá)式；被除數(shù)
One that numbers; an enumerator.
計算者；計數(shù)器