Also known as: ローマ数字, 罗马数字
The ancient Roman way of writing numbers. Likely because of the elegant style, it is still usually recognized and understood by everyday people (at least from 1 to 10), and is frequently used on clocks.
- 1 = I
- 2 = II
- 3 = III
- 4 = IV (one below 5)
- 5 = V
- 6 = VI (one above 5)
- 7 = VII (two above 5)
- 8 = VIII
- 9 = IX
- 10 = X (can be remembered by how 2 V's form an X; 5*2=10)
- 11 = XI
- 12 = XII
- 50 = L
- 100 = C
- 500 = D
- 1000 = M