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need help with numbers - lazydays - 01-16-2010

How would I convert the roman number MXC to arabic?

I know that M=1000, X=10, and C=100 but there are all these rules about adding and subtracting depending on the order and I don't understand. Can someone help? Thanks.


Re: need help with numbers - smanoli - 01-16-2010

MXC is 1090.

The X is subtracted from the C because it's smaller, so that becomes 90. This is added to the M because M is larger than this value.

(I'm sure someone can explain it better than I can....)


Re: need help with numbers - H1N1 - 01-16-2010

1090


Re: need help with numbers - Ken Sp. - 01-16-2010

Larger vs smaller is also affected by the position of X, X is before C so it is subtracted from C (larger) and if it is after It is added

smanoli wrote:
MXC is 1090.

The X is subtracted from the C because it's smaller, so that becomes 90. This is added to the M because M is larger than this value.

(I'm sure someone can explain it better than I can....)



Re: need help with numbers - Seacrest - 01-16-2010

10001000010


Re: need help with numbers - lazydays - 01-17-2010

thank you!