Roman numerals 1 to 10 correspond to: I- 1, II-2, III-3, IV-4, V-5, VI-6, VII-7, VIII-8, VII-9 and VIII respectively. Roman numerals were used in Europe before Arabic numerals were introduced, but they are rarely used now. It came into being later than the numbers in China and Oracle Bone Inscriptions, and even later than the Egyptian decimal numbers. However, its appearance marks the progress of an ancient civilization.

In 2 1 century, Roman numerals have always been a rarely used quantitative representation. Roman numerals are mainly used for some codes, such as product models. Some clocks and watches still use it to represent hours on the surface. Computer ASCII code contains the combination of Roman numerals 1 ~ 12. Because of the complexity of characters, later generations seldom use them.

There is no 0 in Roman numerals of extended data. This notation is very inconvenient. If you represent the number 8732, you should write it out. If you want to have 0, it will be much more convenient. 0 was introduced in the Middle Ages. At that time, the churches in Europe were very powerful. They tried their best to stop the spread of 0, and some people were even executed for spreading 0.

Roman numerals I, II, III, IV, V, VII, VII, VII and VII do not exist in the original nine Roman numerals. The Pope himself believes that using Roman numerals to represent any number is not only completely sufficient, but also perfect. They even announced to the outside world: "Roman numerals were invented by God, and people are not allowed to add or subtract a number at will." 0 is forbidden for people to use.