V stands for the number 5 and V is a Roman numeral.

Roman numeral is a kind of numeral used in Europe before the introduction of Arabic numeral (actually Indian numeral). It is less used now. Its generation is later than the numeral in Chinese oracle and later than the decimal numeral in Egypt. However, its emergence marks the progress of an ancient civilization.

Extended data:

The most common Roman numerals are the dial symbols of clocks: I, II, III, IV, V, VI, VII, VIII, IX, x, Xi, XII

Periodic table of elements: IA, IIA, IIIA, IVA, VA, via, VIIa, IB, IIB, IIIB, IVB, VB, VIB, VIIB, VIII.

The corresponding Arabic numerals (which are now commonly used internationally) are 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12... (Note: Arabic numerals were actually invented by ancient Indians and later introduced into Europe by Arabs, which were mistakenly called Arabic numerals by Europeans.)

In July 2015, Rome, Italy, said that it would abandon the use of Roman numerals and change street signs and official documents into Italian.

Counting method:

Roman numerals were used before Arabic numerals were introduced. Roman numerals use seven Roman letters as numbers, i.e. I (1), X (10), C (100), m (1000), V (5), l (50) and D (500).

1. The number represented by the same number is equal to the number obtained by adding these numbers, for example: Ⅲ = 3.

2. The small number is on the right of the large number. The number represented is equal to the number obtained by adding these numbers, such as Ⅷ = 8 and XII = 12.

3. The small number (limited to I, X and C) is on the left of the large number. The number represented is equal to the number obtained by subtracting the decimal from the large number, such as IV = 4 and IX = 9.

4. In normal use, the number of consecutive words shall not be repeated more than three times.

5. Draw a horizontal line above a number to indicate that the number is expanded 1000 times.

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