# Roman Numerals?

So I is 1 and V is 5 so VI is 6, makes sense because I + V is 5 + 1 is 6 but since were talking about adding shouldn't it not matter when you flip it so V + I is also 6 but apparently VI is 4. I dont get it

opps i typo there IV is 4 not VI

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• roman numerals aren't adding. don't try and apply arabic mathematics to an entirely different numeric system. roman numerals are simply the roman form of numbers so IF you wanted to apply arabic mathematics you wouldn't say IV is the same as I-V or I+V the equation would be V-I

just like 15 and 51 aren't the same VI and IV aren't the same and shouldn't be thought the same in terms of an equation of reaching any outcome

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• OK so if they aren't the same how do know the difference

• because lets say you were back in Rome. you wouldn't do math by simply adding or subtracting the roman numerals you see. so for the example VI if we wanted to apply a similar principle in Arabic numbers it would be 5,1 (with an implication of adding 1) and for IV you'd have 1,5 with implication that the 1 before the five indicates what you are subtracting

does that make sense?
so for the roman numeral 8 (VIII) it would be like taking 5,1,1,1 the placement (in sequence) of the numeral is what implies addition or subtraction rather than the actual roman numeral you see.

• thanks for MH