Talen 180 till 186 i romerska siffror
I högerkolumnen visas hur varje romersk siffra bidrar till att man hamnar vid rätt tal.
| 180 | = | CLXXX | = | 100 + 50 + 10 + 10 + 10 |
| 181 | = | CLXXXI | = | 100 + 50 + 10 + 10 + 10 + 1 |
| 182 | = | CLXXXII | = | 100 + 50 + 10 + 10 + 10 + 1 + 1 |
| 183 | = | CLXXXIII | = | 100 + 50 + 10 + 10 + 10 + 1 + 1 + 1 |
| 184 | = | CLXXXIV | = | 100 + 50 + 10 + 10 + 10 + 5 − 1 |
| 185 | = | CLXXXV | = | 100 + 50 + 10 + 10 + 10 + 5 |
| 186 | = | CLXXXVI | = | 100 + 50 + 10 + 10 + 10 + 5 + 1 |