Talen 2678 till 2684 i romerska siffror
I högerkolumnen visas hur varje romersk siffra bidrar till att man hamnar vid rätt tal.
| 2678 | = | MMDCLXXVIII | = | 1000 + 1000 + 500 + 100 + 50 + 10 + 10 + 5 + 1 + 1 + 1 |
| 2679 | = | MMDCLXXIX | = | 1000 + 1000 + 500 + 100 + 50 + 10 + 10 + 10 − 1 |
| 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 |