15 becomes XV.
19 becomes XIX
25 becomes XXV
49 becomes IL
59 becomes LIX
===========
167 becomes CLXVII
Improved Answer:-
The way in which we write out Roman numerals today differs in the way that the Romans actually did themselves. For example today we would write out 19 as XIX but the Romans probably wrote it out as IXX because the Latin word for IXX is 'undeviginti' which means one from twenty.
From ancient manuscripts and monuments there are clues out there to show that the Romans would have probably wrote out the equivalent of 15, 19, 25, 49 and 59 simply as XV, IXX, XXV, IL and ILX respectively which makes addition straightforward as follows:-
XV+IXX = IXXXV (15+19 = 34)
IXXXV+XXV = ILX (34+25 = 59)
ILX+IL = IICX (59+49 = 108)
IICX+ILX = CLXVII (108+59 = 167)
Alternatively the Romans could have used an abacus counting device and calculated the above numerals in expanded format as:-
XV+XVIIII = XXXIIII (15+19 = 34)
XXXIIII+XXV = LVIIII (34+25 = 59)
LVIIII+XXXXVIIII = CVIII (59+49 = 108)
CVIII+LVIIII = CLXVII (108+59 = 167)
A similar question to this has been recently answered in the Roman Numerals category.
You type roman numerals by using capital letters.
See answer to question: ' How do you add together 1666 and 1999 in two different ways using Roman numerals'
If you mean in Roman numerals then: 753 = DCCLIII
Spend a day using only roman numerals instead of Arabic numerals. The disadvantages will become painfully obvious.
Convert from Roman numerals to Arabic numerals, add, convert back to Roman numerals.
A similar question to this has been recently answered in the Roman Numerals category.
We started Roman Numerals in about the year of 1389 AD I think.
The number 947 in Roman numerals would be CMXLVII
You type roman numerals by using capital letters.
See answer to question: ' How do you add together 1666 and 1999 in two different ways using Roman numerals'
I would add 1999 and 51 together, getting 2050, and convert that to Roman numerals (MML) and hope that was one of the two possible methods.
The answer depends on how many more millennia they keep using Roman numerals!
You cannot write fractions using Roman numerals.
If you mean in Roman numerals then: 753 = DCCLIII
Spend a day using only roman numerals instead of Arabic numerals. The disadvantages will become painfully obvious.
Not really, since roman numerals don't have units smaller then one.