Talen 1378 till 1384 i romerska siffror
I högerkolumnen visas hur varje romersk siffra bidrar till att man hamnar vid rätt tal.
| 1378 | = | MCCCLXXVIII | = | 1000 + 100 + 100 + 100 + 50 + 10 + 10 + 5 + 1 + 1 + 1 |
| 1379 | = | MCCCLXXIX | = | 1000 + 100 + 100 + 100 + 50 + 10 + 10 + 10 − 1 |
| 1380 | = | MCCCLXXX | = | 1000 + 100 + 100 + 100 + 50 + 10 + 10 + 10 |
| 1381 | = | MCCCLXXXI | = | 1000 + 100 + 100 + 100 + 50 + 10 + 10 + 10 + 1 |
| 1382 | = | MCCCLXXXII | = | 1000 + 100 + 100 + 100 + 50 + 10 + 10 + 10 + 1 + 1 |
| 1383 | = | MCCCLXXXIII | = | 1000 + 100 + 100 + 100 + 50 + 10 + 10 + 10 + 1 + 1 + 1 |
| 1384 | = | MCCCLXXXIV | = | 1000 + 100 + 100 + 100 + 50 + 10 + 10 + 10 + 5 − 1 |