端数

1. Origins, structure, and basic meaning

• Structure: 端数 (はすう) is a noun for a numerical or monetary remainder, functioning as a quantity noun.
• Basic usage: 端数を切り上げる makes the leftover part of an amount the object of rounding up, while 端数の小銭 narrows the reference to coins that make up that remainder.

2. Common pitfalls and similar expressions

• Fractions versus odd monetary amounts
  • Both examples concern money or accounting. Accordingly, 端数 is the uneven remainder in 金額の端数, rather than necessarily a mathematical ratio.