The numbers 655 to 661 in roman numerals
The right column shows how each roman numeral adds up to the total.
| 655 | = | DCLV | = | 500 + 100 + 50 + 5 |
| 656 | = | DCLVI | = | 500 + 100 + 50 + 5 + 1 |
| 657 | = | DCLVII | = | 500 + 100 + 50 + 5 + 1 + 1 |
| 658 | = | DCLVIII | = | 500 + 100 + 50 + 5 + 1 + 1 + 1 |
| 659 | = | DCLIX | = | 500 + 100 + 50 + 10 − 1 |
| 660 | = | DCLX | = | 500 + 100 + 50 + 10 |
| 661 | = | DCLXI | = | 500 + 100 + 50 + 10 + 1 |