ⅰ、ⅱ、ⅲ、ⅳ、ⅴ、ⅵ、ⅶ、ⅷ、ⅸ、x、?、?。

Roman numerals are used in Europe before the introduction of Arabic numerals (actually Indian numerals), but they are rarely used now. It came into being later than China's figures and Oracle Bone Inscriptions's, and even later than Egyptian decimal figures. However, its appearance marks the progress of an ancient civilization.

20 15 July, Rome, Italy indicated that it would abandon the use of Roman numerals and change road signs and official documents into Italian.

Extended data:

Multi-livestock grazing together

The most common Roman numerals are the dial symbols of clocks and watches: I, II, III, IV, V, VII, VIII, IX, X, X,, ...

Periodic table of elements: family IA, family IIA, family IIIA, family IVA, family VA, family VIA, family VIIA, family IB, family IIB, family IIIB, family IVB, family VB, family VIB, family VIIB and family VIII.

In musicology, the high and low ordinal numbers of modal scales are called scale marks, which are also called "series" or "symbol numbers". They are marked with Roman numerals I, II, III, IV, V, VI and VII from tonic to tonic.

And in acoustics, Roman numerals are used to mark the harmony series: I, II, III, IV, V, VI and VII correspond to grades one, two, three, four, five, six and seven respectively.

The corresponding Arabic numerals (that is, internationally used numerals) are 1, 2, 3, 4, 5, 6, 7, 8, 9,1,1,12 ... )

References:

Baidu encyclopedia-Roman numerals