XDI - D=500, X=10 and I=1... Placing the X before the D means you subtract it from the larger number, then add the 1. Another (longer) way to write it would be CCCLXXXIX (100+100+100+50+10+10+10+9)
Additional Information:-
In today's notation of Roman numerals 491 is: CDXCI
But the Romans themselves would have worked out 491 as CCCCLXXXXI and then simplified it to XDI (501-10 = 491) which uses less numerals but of equal value
The Roman numerals for 366 are CCCLXVI (CCC = 300; LX = 60; VI = 6)
here you go.In roman`s numberals its looks like this X-10 and XI-11
June XX MCMILIIImproved Answer:-In today's notation of Roman numerals it is: VI-XX-MCMXLII
40032
MCMLXXXXII
1008 in Roman numberals is MVIII
The Roman numerals for 366 are CCCLXVI (CCC = 300; LX = 60; VI = 6)
here you go.In roman`s numberals its looks like this X-10 and XI-11
June XX MCMILIIImproved Answer:-In today's notation of Roman numerals it is: VI-XX-MCMXLII
491 is CDXCI. CD is 500 - 100. XC is 100 - 10. (I is 1.)
CLXXXIX
1736
1607
40032
MCMLXXXXII
It is: 5 = V
2000 = MM