Talen 2409 till 2415 i romerska siffror
I högerkolumnen visas hur varje romersk siffra bidrar till att man hamnar vid rätt tal.
| 2409 | = | MMCDIX | = | 1000 + 1000 + 500 − 100 + 10 − 1 |
| 2410 | = | MMCDX | = | 1000 + 1000 + 500 − 100 + 10 |
| 2411 | = | MMCDXI | = | 1000 + 1000 + 500 − 100 + 10 + 1 |
| 2412 | = | MMCDXII | = | 1000 + 1000 + 500 − 100 + 10 + 1 + 1 |
| 2413 | = | MMCDXIII | = | 1000 + 1000 + 500 − 100 + 10 + 1 + 1 + 1 |
| 2414 | = | MMCDXIV | = | 1000 + 1000 + 500 − 100 + 10 + 5 − 1 |
| 2415 | = | MMCDXV | = | 1000 + 1000 + 500 − 100 + 10 + 5 |