denominator

IPA/dɪˈnɒmɪneɪtə(r)/
KK[dɪnˈɑmənˌetɚ]IPA/dɪˈnɑːmɪneɪtər/

denominator — 名詞

  • denominatorsingular
  • denominatorsplural

1. In a written fraction, the figure placed below the horizontal dividing line that

1.名詞B2
釋義

分母

分數線下方的數字，表示整體被等分的份數

In a written fraction, the figure placed below the horizontal dividing line that indicates how many identical pieces the whole has been split into — for instance, the 4 in ¾ tells you the whole was divided into 4 equal portions.

例句

Nila forgot whether the denominator is the top or bottom number in a fraction.

Nila 忘了分母是分數中上面還是下面的數字。

basic concept: identifying numerator vs denominator

When Nia added ¼ and ⅜, she first checked whether they shared the same denominator.

Nia 在計算 ¼ 加 ⅜ 時，先檢查兩個分數是否有相同的分母。

collocation: share / same denominator

常見搭配
  • common denominator
  • least common denominator
  • same denominator
  • denominator of [number]
  • denominator cannot be zero
同義詞
  • divisor

    more general term used in arithmetic; a divisor can appear outside fraction notation

  • bottom number

    informal, used mainly in primary-school math teaching

反義詞
  • numerator

    the top number in a fraction, indicating how many parts are taken

文法句型

the denominator of [number]

用法筆記

Unlike the numerator, the denominator is never zero. Learners who are unsure which number in a fraction is the denominator can remember: it is the bottom figure, the one written below the horizontal bar.

常見錯誤

The denominator is 3 in the fraction ⅓.
The denominator is 3 in the fraction ⅓
wait, that is actually correct.' (This is a trick — 3 is indeed the denominator in ⅓. A real mistake: ❌ 'The denominator is the top number.' ✅ 'The denominator is the bottom number; the top number is the numerator.' — The two terms are often confused.)
You can write a fraction with zero as the denominator.
The denominator can never be zero because dividing by zero has no meaning in mathematics.
Zero in the denominator makes the fraction undefined.

同根字

常見搭配

名詞搭配

常用片語

  • common denominator
  • least common denominator
  • lowest common denominator

介系詞搭配

  • of [a fraction]
  • with [a common] denominator