Today we write out 1999 in Roman numerals as MCMXCIX, 1951 as MCMLI and to subtract these numerals from one another is quite difficult to say the least.
But the Romans themselves would have probably wrote out 1999 as IMM which is a simplification of MDCCCCLXXXXVIIII and 1951 as LMMI which is a simplification of MDCCCCLI.
So: IMM - LMMI = IIL which is a simplification of XXXXVIII
In fact the Latin word for 48 is 'duodequinquaginta' which literally means two from fifty.
Hindu-Arabic conversion:-
(-1+2000) - (-50+2001) = 48
Remember that in arithmetic a double minus is the equivalent of a plus.
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The number 1999 in Roman numerals is MCMXCIX
The Roman numerals for 07-01-1999 are VII-I-MCMXCIX.
15th November, 1999 is XV. XI. MCMXCIX in Roman numerals.
MIM is an incorrect way of writing 1999 in roman numerals. 1999 should be written MCMXCIX.
July 2nd 1999 can also be written as 07-02-1999 and in Roman numerals this could be written as VIII.II.MCMXCIX.