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How do you total up the roman numerals of CD minus XL plus LX plus XC plus X step by step?
Wiki User
∙ 13y ago
Because of new rules introduced during the Middle Ages the way we write out Roman numerals today are different to the way the Romans actually did themselves and so they probably totalled these numerals in the following logical manner:
CD-XL = LCDX
LCDX+LX = CDXX
CDXX+XC = DX
DX+X = DXX = Total
Converted into Hindu-Arabic numerals:
400-40 = 360
360+60 = 420
420+90 = 510
510+10 = 520 = Total
Remember that in maths a minus minus is equal to a plus and therefore --X = X
Wiki User
∙ 13y ago
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What is 1960 in Roman numerals?
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How do you write negative numbers in Roman Numerals?
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