数字与罗马数字互相转换
Numbers above 3,999 use vinculum notation: a line above a numeral multiplies its value by 1,000.
So XLIXDCLXXVI = 49,676.
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Before Rome: Etruscan Tally Marks
Roman numerals didn't start in Rome. The system evolved from Etruscan tally marks used in central Italy centuries before the Roman Republic. The stroke I for one finger, V for an open hand, X for two hands crossed — these were counting gestures turned into written symbols. Rome adopted and formalized what was already a working system.
Read more →Why Movies Use Roman Numerals in Credits
Look at the end credits of almost any film and you'll see the year in Roman numerals: MMXXVI instead of 2026. This tradition started as a way to make the copyright year less obvious — studios didn't want audiences to know immediately how old a film was during reruns. The practice stuck, and now it's just how it's done.
Read more →罗马数字从何而来？
人们认为罗马数字起源于手势和计数标记。笔画I代表一根手指，V代表拇指和手指之间表示五的间隔，X代表交叉的双手表示十。字母L、C、D和M来自希腊字母chi、theta和phi的变体，分别代表50、100、500和1,000。随着时间推移，这些标记演变成了今天人们所熟知的拉丁字母。罗马字母表中没有0，因为数字0的概念直到印度在大约公元600年 / 10600 HE发明之后才完全发展起来。