Numbers originated in ancient India. At that time, urban construction needed design and planning, sacrifice and calculation of the movement of the sun, the moon and the stars.

That is, later Arabic numerals. Arabic numerals consist of 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 * * * 10 counting symbols. Arabic numerals were first invented by ancient Indians, then spread to Europe by Arabs, and then modernized by Europeans. People think they are the inventions of Arabs, so people call them Arabic numerals.

Around 3000 BC, the number of residents in the Indus Valley was relatively advanced, and the decimal calculation method was adopted. Arabic numerals were not invented by Arabs, but originated in ancient India, and were later mastered, improved and spread to the west by Arabs.