The numbers 1966 to 1972 in roman numerals
The right column shows how each roman numeral adds up to the total.
| 1966 | = | MCMLXVI | = | 1000 + 1000 − 100 + 50 + 10 + 5 + 1 |
| 1967 | = | MCMLXVII | = | 1000 + 1000 − 100 + 50 + 10 + 5 + 1 + 1 |
| 1968 | = | MCMLXVIII | = | 1000 + 1000 − 100 + 50 + 10 + 5 + 1 + 1 + 1 |
| 1969 | = | MCMLXIX | = | 1000 + 1000 − 100 + 50 + 10 + 10 − 1 |
| 1970 | = | MCMLXX | = | 1000 + 1000 − 100 + 50 + 10 + 10 |
| 1971 | = | MCMLXXI | = | 1000 + 1000 − 100 + 50 + 10 + 10 + 1 |
| 1972 | = | MCMLXXII | = | 1000 + 1000 − 100 + 50 + 10 + 10 + 1 + 1 |