Talen 434 till 440 i romerska siffror
I högerkolumnen visas hur varje romersk siffra bidrar till att man hamnar vid rätt tal.
| 434 | = | CDXXXIV | = | 500 − 100 + 10 + 10 + 10 + 5 − 1 |
| 435 | = | CDXXXV | = | 500 − 100 + 10 + 10 + 10 + 5 |
| 436 | = | CDXXXVI | = | 500 − 100 + 10 + 10 + 10 + 5 + 1 |
| 437 | = | CDXXXVII | = | 500 − 100 + 10 + 10 + 10 + 5 + 1 + 1 |
| 438 | = | CDXXXVIII | = | 500 − 100 + 10 + 10 + 10 + 5 + 1 + 1 + 1 |
| 439 | = | CDXXXIX | = | 500 − 100 + 10 + 10 + 10 + 10 − 1 |
| 440 | = | CDXL | = | 500 − 100 + 50 − 10 |