The numbers 423 to 429 in roman numerals
The right column shows how each roman numeral adds up to the total.
| 423 | = | CDXXIII | = | 500 − 100 + 10 + 10 + 1 + 1 + 1 |
| 424 | = | CDXXIV | = | 500 − 100 + 10 + 10 + 5 − 1 |
| 425 | = | CDXXV | = | 500 − 100 + 10 + 10 + 5 |
| 426 | = | CDXXVI | = | 500 − 100 + 10 + 10 + 5 + 1 |
| 427 | = | CDXXVII | = | 500 − 100 + 10 + 10 + 5 + 1 + 1 |
| 428 | = | CDXXVIII | = | 500 − 100 + 10 + 10 + 5 + 1 + 1 + 1 |
| 429 | = | CDXXIX | = | 500 − 100 + 10 + 10 + 10 − 1 |