A numeral: a word that expresses numbers, including cardinal (one, two) and ordinal (first, second) forms; treated as a grammatical category.
日本語の数詞には漢数字と算用数字の使い分けがある。
Japanese numerals distinguish between kanji numerals and Arabic numerals in usage.
英語の 'three' は基数詞、'third' は序数詞という数詞の違いがある。
English 'three' is a cardinal numeral, while 'third' is an ordinal numeral — a difference in numerals.
小学校で数詞の読み方と使い方を学ぶ。
In elementary school, students learn how to read and use numerals.