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 CMXCIXDCLXXXI = 999,681.
Did you know?
The Printing Press Killed Roman Numerals
What finally ended Roman numerals in everyday use wasn't better math — it was Gutenberg. Typesetting Hindu-Arabic numerals was easier: ten compact characters vs. seven letters in elaborate combinations. Books, contracts, and ledgers all switched. By 1500, the debate was over.
Read more →The T-Shirt Factor
LVIII on a t-shirt reads as design, not just a number. The angular shapes of Roman numerals — all straight lines, no curves except in D — lend themselves to bold typography. They can be stacked, stretched, embossed, engraved. Arabic numerals are functional. Roman numerals are wearable. The NFL sells billions in merchandise. Those numerals are a design asset.
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。