Talen 172 till 178 i romerska siffror
I högerkolumnen visas hur varje romersk siffra bidrar till att man hamnar vid rätt tal.
| 172 | = | CLXXII | = | 100 + 50 + 10 + 10 + 1 + 1 |
| 173 | = | CLXXIII | = | 100 + 50 + 10 + 10 + 1 + 1 + 1 |
| 174 | = | CLXXIV | = | 100 + 50 + 10 + 10 + 5 − 1 |
| 175 | = | CLXXV | = | 100 + 50 + 10 + 10 + 5 |
| 176 | = | CLXXVI | = | 100 + 50 + 10 + 10 + 5 + 1 |
| 177 | = | CLXXVII | = | 100 + 50 + 10 + 10 + 5 + 1 + 1 |
| 178 | = | CLXXVIII | = | 100 + 50 + 10 + 10 + 5 + 1 + 1 + 1 |