●小数点
生まれてこの方、小数点は「．」を使用して、何の疑問も感じなかったのですが、世界の少数派であることを知って、ちょっとびっくり。確かに各国で米英の表示法を押し付けられるのは嫌だろうなあ。。。でもこれから千の桁の「,」と「.」が変更されたら、40にして対応は難しいなあ。。。自分の常識は世界の非常識と改めて認識。
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