The numbers 503 to 509 in roman numerals
The right column shows how each roman numeral adds up to the total.
| 503 | = | DIII | = | 500 + 1 + 1 + 1 |
| 504 | = | DIV | = | 500 + 5 − 1 |
| 505 | = | DV | = | 500 + 5 |
| 506 | = | DVI | = | 500 + 5 + 1 |
| 507 | = | DVII | = | 500 + 5 + 1 + 1 |
| 508 | = | DVIII | = | 500 + 5 + 1 + 1 + 1 |
| 509 | = | DIX | = | 500 + 10 − 1 |