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Just as we can add, subtract and multiply numbers, so can we do the same with Roman numerals. Let’s look at the following example:
III - II = ?
III is the same as 1 + 1 + 1 = 3
II is the same as 1 + 1 = 2
III - II then is the same as 3 - 2 = 1
“1” in Roman numerals is “I” so the complete answer is: III - II = I
Now let’s look at another example:
IX x IV = ?
IX is the same as 10 - 1 = 9
IV is the same as 5 - 1 = 4
IX x IV then is the same as 9 x 4 = 36
“36” in Roman numerals is XXXVI so the complete answer is: IX x IV = XXXVI
Some helpful hints to remember are:
5 = V
10 = X
50 = L
100 = C
500 = D
1000 = M
LI is the same as 51
VIII is the same as 8
51 x 8 = 408
“408” in Roman numerals is “CDVIII.” The letter “C” equals “100.” The letter “D” equal “500”. When the letter “C” comes before the letters “D” or “M” is tells you that you must subtract the letters so “CD” is the same as 500 - 100 = 400. “V” is the number 5 and “III” is 1 + 1 + 1 = 3 so 5 + 3 = 8. So the complete answer is: LI x VIII = CDVIII. Answer (d) is the correct answer