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Lele book
Huanhuan gave Lele three books, as many as two. Huanhuan gave Lele three books, Huanhuan was 14-3= 1 1, and Lele was 8+3= 1 1. This is a simple arithmetic problem.

The oldest mathematics, arithmetic, is formed by accumulating and sorting out the properties of numbers and the experience of four operations between numbers in the application process.

All mathematics in ancient times was called arithmetic, and modern algebra and number theory originally developed from arithmetic. Later, the concepts of arithmetic and mathematics appeared, which replaced the meaning of arithmetic and included all mathematics, and arithmetic became a branch of it.

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The development of arithmetic

About the generation of arithmetic, we still have to talk about numbers. Numbers are used to express and discuss quantitative problems. There are different types of quantities and also different types of numbers. As early as the initial stage of ancient development, due to the needs of human daily life and production practice, the simplest concept of natural numbers came into being in the initial stage of cultural development.

In ancient arithmetic, various types of application problems and various methods to solve these problems were discussed. In the long-term research, it will naturally inspire people to seek general methods to solve these application problems.

In other words, can we find a universal and more universal method to solve the same type of application problems, so we invented abstract mathematical symbols, which developed into another ancient branch of mathematics.