Cmxcix + dclxvi = mdclxv
Improved answer in detail:-
999 in Roman numerals: CM+XC+IX = IM
666 in Roman numerals: DC+LX+VI = DCLXVI
999+666 = IM+DCLXVI = MDCLXV
Note that the Romans would have probably total up CM+XC+IX in the following manner:-
CM+XC = XM
XM+IX = IMM
And that they would have probably total up DC+LX+VI in the following manner:-
DC+LX = DCLX
DCLX+VI = DCLXVI
Therefore it follows that:- IM+DCLXVI = MDCLXV (1665)
Roman numerals:- M+1000, D=500, C=100, L=50, X=10, V=5 and I=1
Today we write out 999 in Roman numerals as CMXCIX but the Romans themselves would have probably wrote it out as IM which is the same as DCCCCLXXXXVIIII So: DCCCCLXXXXVIIII minus DCLXVI equals CCCXXXIII (333)
In today's notation of Roman numerals 999 is CMXCIX which makes it quite difficult to perform any mathematical operations with it.But there is evidence that supports the fact that the Romans themselves would have calculated the equivalent of 999 on an abacus counting device as DCCCCLXXXXVIIII and then probably simplified it to IM in written form which would make addition and subtraction simple and straightforward as follows:-AdditionIM+DCLXVI = MDCLXV (1000-1)+(666) = 1665SubtractionDCCCCLXXXXVIIII-DCLXVI = CCCXXXIII (999-666 = 333) by cancelling out the numeralsRoman numerals: M+1000, D=500, C=100, L=50, X=10, V=5 and I=1QED
The number is 99 trillion 999 billion 999 million 999 thousand 999
CMXCIX.999 = CMXCIX
999
Notwithstanding todays modern conversion of 999 into Roman numerals which are CMXCIX inasmuch that the ancient Romans in all probability would have added together the equivalent of 666 and 999 in either of the following formats:-A: DCLXVI+IM = MDCLXV => 666+(1000-1) = 1665B: DCLXVI+DCCCCLXXXXVIIII = MDCLXV => 666+999 = 1665QED
Today we write out 999 in Roman numerals as CMXCIX but the Romans themselves would have probably wrote it out as IM which is the same as DCCCCLXXXXVIIII So: DCCCCLXXXXVIIII minus DCLXVI equals CCCXXXIII (333)
In today's notation of Roman numerals 999 is CMXCIX which makes it quite difficult to perform any mathematical operations with it.But there is evidence that supports the fact that the Romans themselves would have calculated the equivalent of 999 on an abacus counting device as DCCCCLXXXXVIIII and then probably simplified it to IM in written form which would make addition and subtraction simple and straightforward as follows:-AdditionIM+DCLXVI = MDCLXV (1000-1)+(666) = 1665SubtractionDCCCCLXXXXVIIII-DCLXVI = CCCXXXIII (999-666 = 333) by cancelling out the numeralsRoman numerals: M+1000, D=500, C=100, L=50, X=10, V=5 and I=1QED
The number is 99 trillion 999 billion 999 million 999 thousand 999
CMXCIX.999 = CMXCIX
999
bar(bar(CMXCIX)CMXCIX)CMXCIX
Any number between 1 and 1000 can be expressed using a combination of the Roman numerals; I (1), V (5), X (10), L (50, C (100), D (500) and M (1000). Examples; 666 would be DCLXVI, 999 would be CMXCIX and 423 would be CDXXIII.
IM represents 999 in Roman numerals (-1+1000).
I think it is IXIXIX. I checked the Internet and that what I got but hey it might be wrong.Improved Answer:-In accordance with today's rules governing the Roman numerals 999 converted into Roman numerals works out as CMXCIX.But during the Roman era the Romans themselves would have calculated the equivalent of 999 on an abacus counting device as DCCCCLXXXXVIIII and probably simplified it to IM (-1+1000 = 999) in written form.
Notwithstanding todays modern conversion of 999 into Roman numerals which is now considered to be CMXCIX inasmuch that the ancient Romans would have probably added together the equivalent of 777 and 999 in either of the following formats:- Abridged format: DCCLXXVII+IM = MDCCLXXVI => 777+(1000-1) = 1776 Elongated format: DCCLXXVII+DCCCCLXXXXVIIII = MDCCLXXVI => 777+999 = 1776 QED
It is: DCCCCLXXXXVIIII = 999 although some would say it is DCCCLXXXVIII = 888 because under today's rules now governing the Roman numeral system 999 is now considered to be CMXCIX but the ancient Romans would have worked out the equivalent of 999 as DCCCCLXXXXVIIII which can be abridged to IM = -1+1000 = 999