terminating decimal; finite decimal
Rare mathematical term for a decimal that ends after a finite number of digits. In modern Japanese mathematics, 有限小数 is far more common.
尽数 was once used in mathematical literature to refer to a finite decimal.
non-terminating decimal; infinite decimal
From 尽 (end, exhaust) and 数 (number), literally 'ending number'. The exact historical derivation is uncertain; it is an older mathematical coinage now largely replaced by 有限小数.