The numbers 680 to 686 in roman numerals
The right column shows how each roman numeral adds up to the total.
| 680 | = | DCLXXX | = | 500 + 100 + 50 + 10 + 10 + 10 |
| 681 | = | DCLXXXI | = | 500 + 100 + 50 + 10 + 10 + 10 + 1 |
| 682 | = | DCLXXXII | = | 500 + 100 + 50 + 10 + 10 + 10 + 1 + 1 |
| 683 | = | DCLXXXIII | = | 500 + 100 + 50 + 10 + 10 + 10 + 1 + 1 + 1 |
| 684 | = | DCLXXXIV | = | 500 + 100 + 50 + 10 + 10 + 10 + 5 − 1 |
| 685 | = | DCLXXXV | = | 500 + 100 + 50 + 10 + 10 + 10 + 5 |
| 686 | = | DCLXXXVI | = | 500 + 100 + 50 + 10 + 10 + 10 + 5 + 1 |