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Subtractive Pairs Poster
Roman-Numerals.net · https://roman-numerals.net/printables/subtractive-pairs/
| Pair | Value | Meaning |
|---|---|---|
| IV | 4 | V − I |
| IX | 9 | X − I |
| XL | 40 | L − X |
| XC | 90 | C − X |
| CD | 400 | D − C |
| CM | 900 | M − C |
Only these six pairs are valid. Forms such as IL, IC, and XD are incorrect.