Talen 1825 till 1831 i romerska siffror
I högerkolumnen visas hur varje romersk siffra bidrar till att man hamnar vid rätt tal.
| 1825 | = | MDCCCXXV | = | 1000 + 500 + 100 + 100 + 100 + 10 + 10 + 5 |
| 1826 | = | MDCCCXXVI | = | 1000 + 500 + 100 + 100 + 100 + 10 + 10 + 5 + 1 |
| 1827 | = | MDCCCXXVII | = | 1000 + 500 + 100 + 100 + 100 + 10 + 10 + 5 + 1 + 1 |
| 1828 | = | MDCCCXXVIII | = | 1000 + 500 + 100 + 100 + 100 + 10 + 10 + 5 + 1 + 1 + 1 |
| 1829 | = | MDCCCXXIX | = | 1000 + 500 + 100 + 100 + 100 + 10 + 10 + 10 − 1 |
| 1830 | = | MDCCCXXX | = | 1000 + 500 + 100 + 100 + 100 + 10 + 10 + 10 |
| 1831 | = | MDCCCXXXI | = | 1000 + 500 + 100 + 100 + 100 + 10 + 10 + 10 + 1 |