numeral ダウンロード 🔗共有 八十 The cardinal number occurring after seventy-nine and before eighty-one, represented in Roman numerals as LXXX and in Arabic numerals as 80. Examples : "There were eighty students in the class. " クラスには80人の生徒がいました。 number math AIとチャット語彙ゲーム読解練習