Four ancient civilizations: ancient Babylon, ancient Egypt, ancient India and China. Different counting systems have created different mathematical development history. In the process of exploring nature, human beings have produced various counting needs, which is also the reason why counting systems were born in different civilizations.

Here is a brief introduction to the counting systems of various civilizations:

1. 1 Mesopotamia (Cuba)

1. 1. 1 digital representation

Mesopotamia used cuneiform to count.

Numbers originated in ancient India, one of the four ancient civilizations! In the 3rd century AD, a scientist in ancient India, Baghdad, invented digital symbols. The first number symbol is 3 at most, and later generations gradually optimized it on this basis, and began to evolve the perfect number system of 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9, becoming the ancestor of Arabic numerals.

Addition and subtraction within 1000 is a topic in the second grade of primary school mathematics.