Talen 784 till 790 i romerska siffror
I högerkolumnen visas hur varje romersk siffra bidrar till att man hamnar vid rätt tal.
| 784 | = | DCCLXXXIV | = | 500 + 100 + 100 + 50 + 10 + 10 + 10 + 5 − 1 |
| 785 | = | DCCLXXXV | = | 500 + 100 + 100 + 50 + 10 + 10 + 10 + 5 |
| 786 | = | DCCLXXXVI | = | 500 + 100 + 100 + 50 + 10 + 10 + 10 + 5 + 1 |
| 787 | = | DCCLXXXVII | = | 500 + 100 + 100 + 50 + 10 + 10 + 10 + 5 + 1 + 1 |
| 788 | = | DCCLXXXVIII | = | 500 + 100 + 100 + 50 + 10 + 10 + 10 + 5 + 1 + 1 + 1 |
| 789 | = | DCCLXXXIX | = | 500 + 100 + 100 + 50 + 10 + 10 + 10 + 10 − 1 |
| 790 | = | DCCXC | = | 500 + 100 + 100 + 100 − 10 |