Sundials sometimes use Roman numerals.
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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:
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