noun
mathematical principle; mathematics
Refers to the theoretical or logical foundation of mathematics, often used in academic or formal contexts.
彼は数理の研究に没頭している。
He is absorbed in the study of mathematical principles.
noun
arithmetic; figures; accounts
Practical use for calculation, numbers, or financial accounts; less common than 計算 or 算数 in everyday speech.
経理部では日々数理を扱っている。
The accounting department deals with figures every day.