The numbers 1809 to 1815 in roman numerals
The right column shows how each roman numeral adds up to the total.
| 1809 | = | MDCCCIX | = | 1000 + 500 + 100 + 100 + 100 + 10 − 1 |
| 1810 | = | MDCCCX | = | 1000 + 500 + 100 + 100 + 100 + 10 |
| 1811 | = | MDCCCXI | = | 1000 + 500 + 100 + 100 + 100 + 10 + 1 |
| 1812 | = | MDCCCXII | = | 1000 + 500 + 100 + 100 + 100 + 10 + 1 + 1 |
| 1813 | = | MDCCCXIII | = | 1000 + 500 + 100 + 100 + 100 + 10 + 1 + 1 + 1 |
| 1814 | = | MDCCCXIV | = | 1000 + 500 + 100 + 100 + 100 + 10 + 5 − 1 |
| 1815 | = | MDCCCXV | = | 1000 + 500 + 100 + 100 + 100 + 10 + 5 |