During the Roman era the equivalent of 2-1990-8 was probably II-XMM-IIX.
But in today's revised notation of Roman numerals 2-1990-8 is written out as II-MCMXC-VIII.
The former notation of Roman numerals seems more plausible than the latter.
In today's terms 05-08-1990 converted into Roman numerals is V-VIII-MCMXC. But in the times of the Romans themselves they would have probably wrote this out as V-VIII-MDCCCCLXXXX which can be simplified to V-IIX-XMM in the same way that the Roman numerals IIII and VIIII (4 and 9) are simplified to IV and IX respectively.
It is not a proper Roman numeral. IV is 6 XX is 20 XMM makes no sense as X=10 and MM would be 2000 If they meant 1990, the correct format would be MCMXC
In todays notation of Roman numerals: IX-XXV-MCMXC Note that the ancient Romans probably wrote out 1990 simply as XMM (2000-10)
XI-VI-MDCCCCLXXXX or XI-VI-XMM. Note that 1990 is notcorrectly expressed as MCMXC in Roman numerals because of sound mathematical reasons.
XMM
In today's terms 10-08-1990 changed into Roman numerals is X-VIII-MCMXC. However, the Romans themselves probably wrote this out as X-VIII-MDCCCCLXXXX which can be simplified to X-IIX-XMM in the same way the Roman numerals IIII and VIIII (4 and 9) are simplified to IV and IX respectively.
In today's terms 05-08-1990 converted into Roman numerals is V-VIII-MCMXC. But in the times of the Romans themselves they would have probably wrote this out as V-VIII-MDCCCCLXXXX which can be simplified to V-IIX-XMM in the same way that the Roman numerals IIII and VIIII (4 and 9) are simplified to IV and IX respectively.
It is not a proper Roman numeral. IV is 6 XX is 20 XMM makes no sense as X=10 and MM would be 2000 If they meant 1990, the correct format would be MCMXC
In todays notation of Roman numerals: IX-XXV-MCMXC Note that the ancient Romans probably wrote out 1990 simply as XMM (2000-10)
XI-VI-MDCCCCLXXXX or XI-VI-XMM. Note that 1990 is notcorrectly expressed as MCMXC in Roman numerals because of sound mathematical reasons.
XMM
In today's modern conversion it is: XVIII-IX-MCMXC
In today's notation:- XII-XIII-MCMXC but the Romans would have probably spelt out 1990 as XMM (-10+2000=1990)
In todays terms: X-XVI-MCMXC But the ancient Romans probably wrote out 1990 simply as XMM (2000-10)
According to today's rules we would write out the equivalent of 1066 and 1999 into Roman numerals as MLXVI and MCMXCIX respectively and to add them together is quite difficult. But the Romans probably simplified MCMXCIX to IMM in the following manner:- M+CM = CMM (1000+900 = 1900) CMM+XC = XMM (1900+90 = 1990) XMM+IX = IMM (1990+9 = 1999) Therefore: MLXVI+IMM = MMMLXV (1066+1999 = 3065)
With difficulty because new rules governing the Roman numeral system were introduced during the Middle Ages and as a result of these new rules the way we work out Roman numerals today are different to the way that the Romans actually did themselves but the methodical Romans would have probably totalled these numerals in the following logical manner: M+CM = CMM CMM+XC = XMM XMM+IX = IMM IMM+XI = MMX = Total And when converted into Hindu-Arabic numerals: 1000+900 = 1900 1900+90 = 1990 1990+9 = 1999 1999+11 = 2010 = Total Note that the above numerals are fairly simple to work out and so for any complicated calculations the Romans would have used an abacus counting device.
The way we calculate Roman numerals today are different in the way that the Romans actually did themselves because of changes to the rules governing the Roman numeral system introduced during the Middle Ages. In all probability the ingenious Romans would have added the above numbers when converted into Roman numerals in the following manner:- M + CM = CMM CMM + XC = XMM XMM + IX = IMM IMM + I = MM Hindu-Arabic conversion:- 1000 + 900 = 1900 1900 + 90 = 1990 1990 + 9 = 1999 1999 + 1 = 2000 For more complicated calculations the Romans would use an abacus counting device.