The numbers 1817 to 1823 in roman numerals
The right column shows how each roman numeral adds up to the total.
| 1817 | = | MDCCCXVII | = | 1000 + 500 + 100 + 100 + 100 + 10 + 5 + 1 + 1 |
| 1818 | = | MDCCCXVIII | = | 1000 + 500 + 100 + 100 + 100 + 10 + 5 + 1 + 1 + 1 |
| 1819 | = | MDCCCXIX | = | 1000 + 500 + 100 + 100 + 100 + 10 + 10 − 1 |
| 1820 | = | MDCCCXX | = | 1000 + 500 + 100 + 100 + 100 + 10 + 10 |
| 1821 | = | MDCCCXXI | = | 1000 + 500 + 100 + 100 + 100 + 10 + 10 + 1 |
| 1822 | = | MDCCCXXII | = | 1000 + 500 + 100 + 100 + 100 + 10 + 10 + 1 + 1 |
| 1823 | = | MDCCCXXIII | = | 1000 + 500 + 100 + 100 + 100 + 10 + 10 + 1 + 1 + 1 |