The numbers 615 to 621 in roman numerals
The right column shows how each roman numeral adds up to the total.
| 615 | = | DCXV | = | 500 + 100 + 10 + 5 |
| 616 | = | DCXVI | = | 500 + 100 + 10 + 5 + 1 |
| 617 | = | DCXVII | = | 500 + 100 + 10 + 5 + 1 + 1 |
| 618 | = | DCXVIII | = | 500 + 100 + 10 + 5 + 1 + 1 + 1 |
| 619 | = | DCXIX | = | 500 + 100 + 10 + 10 − 1 |
| 620 | = | DCXX | = | 500 + 100 + 10 + 10 |
| 621 | = | DCXXI | = | 500 + 100 + 10 + 10 + 1 |