The first rule - Roman numerals set of basic symbols
Roman numerals set of basic symbols:
The major numerals, the symbols that were used to build the rest of the numbers in the Roman system:
1 = I (one)
5 = V (five)
10 = X (ten)
50 = L (fifty)
100 = C (one hundred)
500 = D (five hundred)
1,000 = M (one thousand)
* The numerals below were a later addition to the Roman numeral system; these numerals were also written with a bar above them or between two vertical bars, to indicate multiplication by 1,000. We prefer this kind of writing, between brackets because it's more accessible to computer users and for avoiding any possible confusion with the symbol for one - I.
5,000 = (V) (five thousand) *
10,000 = (X) (ten thousand) *
50,000 = (L) (fifty thousand) *
100,000 = (C) (one hundred thousand ) *
500,000 = (D) (five hundred thousand) *
1,000,000 = (M) (one million) *
At the beginning, Romans did not use numbers larger than 3999, having no representation for larger numbers as: 5,000, 10,000, 50,000, 100,000, 500,000, 1,000,000. These were added later on and for them various different notations were used, not necessarily the ones above.
Thus, initially, the maximum larger number that was written with Roman numerals was: 3,999 = MMMCMXCIX.
Roman numerals reading rules, summary:
I. The first rule - Roman numerals set of basic symbols