Talen 3909 till 3915 i romerska siffror
I högerkolumnen visas hur varje romersk siffra bidrar till att man hamnar vid rätt tal.
| 3909 | = | MMMCMIX | = | 1000 + 1000 + 1000 + 1000 − 100 + 10 − 1 |
| 3910 | = | MMMCMX | = | 1000 + 1000 + 1000 + 1000 − 100 + 10 |
| 3911 | = | MMMCMXI | = | 1000 + 1000 + 1000 + 1000 − 100 + 10 + 1 |
| 3912 | = | MMMCMXII | = | 1000 + 1000 + 1000 + 1000 − 100 + 10 + 1 + 1 |
| 3913 | = | MMMCMXIII | = | 1000 + 1000 + 1000 + 1000 − 100 + 10 + 1 + 1 + 1 |
| 3914 | = | MMMCMXIV | = | 1000 + 1000 + 1000 + 1000 − 100 + 10 + 5 − 1 |
| 3915 | = | MMMCMXV | = | 1000 + 1000 + 1000 + 1000 − 100 + 10 + 5 |