About 3 million years ago, people in primitive society counted by tying knots on ropes, and the size of knots was used to indicate the size of wild animals. This is how the concept of number gradually developed. About five or six thousand years ago, the ancient Egyptians studied agricultural production earlier.

The Nile floods regularly in July every year, and the flood gradually decreases in June 5438+065438+ 10. At that time, the agricultural system in ancient Egypt was that the king distributed square land of the same size to everyone, and the cultivators paid part of the harvest every year. If the flood washes away their cultivated land, they can report to the king, who will send someone to investigate and measure the loss, so that they can pay less rent accordingly.

The measurement of land finally produced geometry. In fact, geometry originally meant "land survey". Mathematics begins with "settlement" and "land survey". More than two thousand years ago, the ancient Greeks living in Southeast Europe inherited and developed these mathematical knowledge and developed mathematics into a science. After the destruction of ancient Greek civilization, Arabs preserved and developed their own culture, and later it was sent back to Europe, and mathematics flourished again, which eventually led to the establishment of modern mathematics.

Mathematics is not only an abstract discipline, but also a tool discipline. Mathematics will develop only when there are practical problems and mathematics is needed. Otherwise, in a society with extremely low productivity, no one will study these things. Specializing in research is a modern thing.

Historically, the emergence of any major problems will only promote the development of tool discipline when it needs to be solved. ...