Talen 1799 till 1805 i romerska siffror
I högerkolumnen visas hur varje romersk siffra bidrar till att man hamnar vid rätt tal.
| 1799 | = | MDCCXCIX | = | 1000 + 500 + 100 + 100 + 100 − 10 + 10 − 1 |
| 1800 | = | MDCCC | = | 1000 + 500 + 100 + 100 + 100 |
| 1801 | = | MDCCCI | = | 1000 + 500 + 100 + 100 + 100 + 1 |
| 1802 | = | MDCCCII | = | 1000 + 500 + 100 + 100 + 100 + 1 + 1 |
| 1803 | = | MDCCCIII | = | 1000 + 500 + 100 + 100 + 100 + 1 + 1 + 1 |
| 1804 | = | MDCCCIV | = | 1000 + 500 + 100 + 100 + 100 + 5 − 1 |
| 1805 | = | MDCCCV | = | 1000 + 500 + 100 + 100 + 100 + 5 |