1. Different origins

1. Roman numerals: Roman numerals are more than 2,000 years earlier than Arabic numerals and originated in ancient Rome. About 2,500 years ago, when the Romans were in the early stages of their cultural development, they used their fingers as a calculation tool. To represent one, two, three, and four objects, stretch out one, two, three, and four fingers respectively; to represent five objects, stretch out one hand; to represent ten objects, stretch out two hands. This habit has been used by humans to this day.

2. Greek numerals: From the 4th century BC, Attic numerals were replaced by a semi-decimal alphabetic system, sometimes called Ionian numerals. Each single digit is represented by a letter, each tens digit is represented by another letter, and the same is true for hundreds digits.

2. Different writing methods

1. Roman numerals: I, Ⅱ, Ⅲ, Ⅳ, Ⅴ, Ⅵ, Ⅶ, Ⅷ, Ⅸ.

2. Greek numbers: α, β, γ, δ, ε, ? or ? or ?, ζ, η, θ.

Common uses of Roman numerals

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

2. In musicology, the ordinal number of modal tone levels is called tone level mark, also known as "series" or "number". From the tonic upward, they are marked with Roman numerals I, II, III, IV, V, VI, and VII.

3. Roman numerals are used to mark harmonic progressions in harmony: Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅴ, Ⅵ, Ⅶ respectively correspond to the first, second, third, fourth and fifth levels. , Level 6, Level 7.

The above content refers to? Baidu Encyclopedia - Greek numerals

The above content refers to? Baidu Encyclopedia - Roman numerals