Talen 2680 till 2686 i romerska siffror
I högerkolumnen visas hur varje romersk siffra bidrar till att man hamnar vid rätt tal.
| 2680 | = | MMDCLXXX | = | 1000 + 1000 + 500 + 100 + 50 + 10 + 10 + 10 |
| 2681 | = | MMDCLXXXI | = | 1000 + 1000 + 500 + 100 + 50 + 10 + 10 + 10 + 1 |
| 2682 | = | MMDCLXXXII | = | 1000 + 1000 + 500 + 100 + 50 + 10 + 10 + 10 + 1 + 1 |
| 2683 | = | MMDCLXXXIII | = | 1000 + 1000 + 500 + 100 + 50 + 10 + 10 + 10 + 1 + 1 + 1 |
| 2684 | = | MMDCLXXXIV | = | 1000 + 1000 + 500 + 100 + 50 + 10 + 10 + 10 + 5 − 1 |
| 2685 | = | MMDCLXXXV | = | 1000 + 1000 + 500 + 100 + 50 + 10 + 10 + 10 + 5 |
| 2686 | = | MMDCLXXXVI | = | 1000 + 1000 + 500 + 100 + 50 + 10 + 10 + 10 + 5 + 1 |