Talen 3985 till 3991 i romerska siffror
I högerkolumnen visas hur varje romersk siffra bidrar till att man hamnar vid rätt tal.
| 3985 | = | MMMCMLXXXV | = | 1000 + 1000 + 1000 + 1000 − 100 + 50 + 10 + 10 + 10 + 5 |
| 3986 | = | MMMCMLXXXVI | = | 1000 + 1000 + 1000 + 1000 − 100 + 50 + 10 + 10 + 10 + 5 + 1 |
| 3987 | = | MMMCMLXXXVII | = | 1000 + 1000 + 1000 + 1000 − 100 + 50 + 10 + 10 + 10 + 5 + 1 + 1 |
| 3988 | = | MMMCMLXXXVIII | = | 1000 + 1000 + 1000 + 1000 − 100 + 50 + 10 + 10 + 10 + 5 + 1 + 1 + 1 |
| 3989 | = | MMMCMLXXXIX | = | 1000 + 1000 + 1000 + 1000 − 100 + 50 + 10 + 10 + 10 + 10 − 1 |
| 3990 | = | MMMCMXC | = | 1000 + 1000 + 1000 + 1000 − 100 + 100 − 10 |
| 3991 | = | MMMCMXCI | = | 1000 + 1000 + 1000 + 1000 − 100 + 100 − 10 + 1 |