9 is IX. XI is 11. Roman numerals are as follows:
I=1
V=5
X=10
Thus, if you see IX that means 1 and 10, since the I is in front, it is subtration, therefore it is 9. XI is 11, simple addition, just like III is 3, VII is 7, etc. etc..
9 is IX. XI is 11. Roman numerals are as follows:
I=1
V=5
X=10
Thus, if you see IX that means 1 and 10, since the I is in front, it is subtration, therefore it is 9. XI is 11, simple addition, just like III is 3, VII is 7, etc. etc..
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