Konversi angka ke dan dari angka Romawi
Numbers above 3,999 use vinculum notation: a line above a numeral multiplies its value by 1,000.
So XLIXDCLXXXII = 49.682.
Did you know?
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 →The Subtraction Rule: Elegant Shorthand
The subtraction rule is what makes Roman numerals clever rather than just tedious. Instead of writing IIII for 4, you write IV: "one before five." Instead of DCCCC for 900, you write CM: "one hundred before one thousand." Only six subtractive pairs exist (IV, IX, XL, XC, CD, CM), and once you know them, you can read any Roman numeral instantly.
Read more →Dari mana angka Romawi berasal?
Diyakini bahwa angka Romawi berasal dari isyarat tangan dan tanda penghitungan. Goresan I melambangkan satu jari, V melambangkan celah antara ibu jari dan jari-jari untuk lima, dan X melambangkan tangan yang disilangkan untuk sepuluh. Huruf L, C, D, dan M berasal dari modifikasi huruf Yunani seperti chi, theta, dan phi untuk melambangkan 50, 100, 500, dan 1.000. Seiring waktu, tanda-tanda ini berubah menjadi huruf Latin yang dikenal orang saat ini. Tidak ada angka 0 dalam alfabet Romawi, karena konsep angka 0 baru berkembang sepenuhnya setelah India menemukannya sekitar 600 M / 10600 HE.