The numbers 305 to 311 in roman numerals
The right column shows how each roman numeral adds up to the total.
| 305 | = | CCCV | = | 100 + 100 + 100 + 5 |
| 306 | = | CCCVI | = | 100 + 100 + 100 + 5 + 1 |
| 307 | = | CCCVII | = | 100 + 100 + 100 + 5 + 1 + 1 |
| 308 | = | CCCVIII | = | 100 + 100 + 100 + 5 + 1 + 1 + 1 |
| 309 | = | CCCIX | = | 100 + 100 + 100 + 10 − 1 |
| 310 | = | CCCX | = | 100 + 100 + 100 + 10 |
| 311 | = | CCCXI | = | 100 + 100 + 100 + 10 + 1 |