Talen 1654 till 1660 i romerska siffror
I högerkolumnen visas hur varje romersk siffra bidrar till att man hamnar vid rätt tal.
| 1654 | = | MDCLIV | = | 1000 + 500 + 100 + 50 + 5 − 1 |
| 1655 | = | MDCLV | = | 1000 + 500 + 100 + 50 + 5 |
| 1656 | = | MDCLVI | = | 1000 + 500 + 100 + 50 + 5 + 1 |
| 1657 | = | MDCLVII | = | 1000 + 500 + 100 + 50 + 5 + 1 + 1 |
| 1658 | = | MDCLVIII | = | 1000 + 500 + 100 + 50 + 5 + 1 + 1 + 1 |
| 1659 | = | MDCLIX | = | 1000 + 500 + 100 + 50 + 10 − 1 |
| 1660 | = | MDCLX | = | 1000 + 500 + 100 + 50 + 10 |