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.
If you mean CD plus DC then in Roman numerals they add up to M meaning 400 plus 600 = 1000
Eleven in Roman numerals is XI.Eleven in Roman numerals is XI.Eleven in Roman numerals is XI.Eleven in Roman numerals is XI.Eleven in Roman numerals is XI.Eleven in Roman numerals is XI.Eleven in Roman numerals is XI.Eleven in Roman numerals is XI.Eleven in Roman numerals is XI.
ii plus xii equals xiv in Roman numerals.
The answer is 281.....but im Roman Numerals it is.......CCLXXXI
1900 is shown by a thousand plus a thousand minus 100. The depiction would be MCMXV.
If you mean CD plus DC then in Roman numerals they add up to M meaning 400 plus 600 = 1000
Eleven in Roman numerals is XI.Eleven in Roman numerals is XI.Eleven in Roman numerals is XI.Eleven in Roman numerals is XI.Eleven in Roman numerals is XI.Eleven in Roman numerals is XI.Eleven in Roman numerals is XI.Eleven in Roman numerals is XI.Eleven in Roman numerals is XI.
ii plus xii equals xiv in Roman numerals.
The answer is 281.....but im Roman Numerals it is.......CCLXXXI
1900 is shown by a thousand plus a thousand minus 100. The depiction would be MCMXV.
MMMI. M=1000 and I=1. Therefore three times M plus one times I equals MMMI.
CXVIII
L represents the number 50. That would be 50 plus 10 plus 4 or 64.
1400 in Roman numerals
20
IV + I = V
As l11 are not Roman numerals they cannot meaningfully be added to XX (20) to make any result.