端 数(はすう)

はすう

noun

fraction; remainder; odd amount

1. fraction; remainder; odd amount; fractional amount

A partial or leftover amount that does not form a round number, especially in the context of money, measurements, or calculations. Commonly refers to amounts below a convenient rounding unit, such as the yen below a hundred-yen mark.

端数(はすう)は切(き)り捨(す)てます。

We round down the fractional amount.

端数(はすう)を切(き)り上(あ)げて1,000円(えん)にした。

I rounded up the odd amount to 1,000 yen.

割(わ)り勘(かん)のとき、端数(はすう)は言(い)い出(だ)した人(ひと)が払(はら)うことが多(おお)い。

When splitting the bill, the person who suggested it usually pays the odd amount.

消費税(しょうひぜい)の計算(けいさん)で端数(はすう)が出(で)た場合(ばあい)はどうしますか。

What do you do when a fractional amount comes up in the consumption tax calculation?

Composed of 端(は) (edge, fraction, fragment) and 数(すう) (number). Refers to the inconvenient leftover portion of a number that prevents it from being round. Most commonly encountered when dealing with money — splitting bills, calculating tax, making change — but also applies to measurements and data.

In financial contexts, 端数(はすう) is handled by either 切(き)り捨(す)て (rounding down), 切(き)り上(あ)げ (rounding up), or 四捨五入(ししゃごにゅう) (standard rounding). These are standard terms in Japanese arithmetic and accounting.

Common collocations

端数(はすう)を切(き)り捨(す)てる: to round down the fraction
端数(はすう)を切(き)り上(あ)げる: to round up the fraction
端数(はすう)が出(で)る: a fractional amount arises
端数(はすう)処理(しょり): fractional amount handling (in accounting/programming)

Similar words

余(あま)り: remainder — the mathematical remainder from division; more general
小数点(しょうすうてん): decimal point — related concept but refers to the notation, not the amount
半端(はんぱ): incomplete, odd — describes something that is not a full unit; broader in meaning

Related Words

Compare: 余(あま)り (remainder)

Compare: 小数点(しょうすうてん) (decimal point)

Compare: 半端(はんぱ) (incomplete, odd)

Compare: 概数(がいすう) (approximate number)

general

Added 2026.4.12 23:07 · Revised 2026.9.2 13:02

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