The numbers 601 to 607 in roman numerals
The right column shows how each roman numeral adds up to the total.
| 601 | = | DCI | = | 500 + 100 + 1 |
| 602 | = | DCII | = | 500 + 100 + 1 + 1 |
| 603 | = | DCIII | = | 500 + 100 + 1 + 1 + 1 |
| 604 | = | DCIV | = | 500 + 100 + 5 − 1 |
| 605 | = | DCV | = | 500 + 100 + 5 |
| 606 | = | DCVI | = | 500 + 100 + 5 + 1 |
| 607 | = | DCVII | = | 500 + 100 + 5 + 1 + 1 |