The numbers 1840 to 1846 in roman numerals
The right column shows how each roman numeral adds up to the total.
| 1840 | = | MDCCCXL | = | 1000 + 500 + 100 + 100 + 100 + 50 − 10 |
| 1841 | = | MDCCCXLI | = | 1000 + 500 + 100 + 100 + 100 + 50 − 10 + 1 |
| 1842 | = | MDCCCXLII | = | 1000 + 500 + 100 + 100 + 100 + 50 − 10 + 1 + 1 |
| 1843 | = | MDCCCXLIII | = | 1000 + 500 + 100 + 100 + 100 + 50 − 10 + 1 + 1 + 1 |
| 1844 | = | MDCCCXLIV | = | 1000 + 500 + 100 + 100 + 100 + 50 − 10 + 5 − 1 |
| 1845 | = | MDCCCXLV | = | 1000 + 500 + 100 + 100 + 100 + 50 − 10 + 5 |
| 1846 | = | MDCCCXLVI | = | 1000 + 500 + 100 + 100 + 100 + 50 − 10 + 5 + 1 |