Converta números para e de algarismos romanos
Numbers above 3,999 use vinculum notation: a line above a numeral multiplies its value by 1,000.
So CMXCIXCMXCIXDCXCVIII = 999.999.698.
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 →Fibonacci's Sales Pitch
Fibonacci didn't invent Hindu-Arabic numerals — they originated in India around 500 AD. But his 1202 book Liber Abaci was essentially a 600-page argument that these new numbers were better for business. He showed European merchants how place value and zero could transform trade and banking. He was right. By 1500, the debate was over.
Read more →De onde vêm os números romanos?
Acredita-se que os números romanos tenham origem em sinais manuais e marcas de contagem. O traço I representa um dedo, o V representa o espaço entre o polegar e os dedos para o cinco, e o X representa as mãos cruzadas para o dez. As letras L, C, D e M vêm de modificações de letras gregas como chi, theta e phi para representar 50, 100, 500 e 1.000. Com o tempo, essas marcas se transformaram nas letras latinas reconhecidas hoje. Não existe 0 no alfabeto romano, pois o conceito do número 0 só se desenvolveu plenamente depois que a Índia o inventou por volta de 600 d.C. / 10600 HE.