Talen 980 till 986 i romerska siffror
I högerkolumnen visas hur varje romersk siffra bidrar till att man hamnar vid rätt tal.
| 980 | = | CMLXXX | = | 1000 − 100 + 50 + 10 + 10 + 10 |
| 981 | = | CMLXXXI | = | 1000 − 100 + 50 + 10 + 10 + 10 + 1 |
| 982 | = | CMLXXXII | = | 1000 − 100 + 50 + 10 + 10 + 10 + 1 + 1 |
| 983 | = | CMLXXXIII | = | 1000 − 100 + 50 + 10 + 10 + 10 + 1 + 1 + 1 |
| 984 | = | CMLXXXIV | = | 1000 − 100 + 50 + 10 + 10 + 10 + 5 − 1 |
| 985 | = | CMLXXXV | = | 1000 − 100 + 50 + 10 + 10 + 10 + 5 |
| 986 | = | CMLXXXVI | = | 1000 − 100 + 50 + 10 + 10 + 10 + 5 + 1 |