In our daily life, we often use the numbers 0, 1, 2, 3, 4, 5, 6, 7.8, 9, which are the data of the mathematical tabloids. Do you know who created these numbers?

These digital symbols were originally created by ancient Indians, and later spread to Arabia, and from Arabia to Europe. Europeans mistakenly thought it was created by Arabs, so they called it "Arabic numerals". Because they have been circulated for many years, people still make mistakes, so people still input these digital symbols created by ancient Indians into Arabic numerals.

As early as the Spring and Autumn Period and the Warring States Period BC, Jiujiu songs have been widely used by people. In many works at that time, there were records about Jiujiu songs. The original 99 songs started from "99.8 1" to "22.24", with 36 sentences. Because it started with "998 1", it was named 99 Song.

In the 5th to10th century, Jiujiu Song was expanded to "Ruyi". Around 13 and 14 centuries, the order of Jiujiu songs became the same as it is now used.

The mystery of mathematics is everywhere. Collect some interesting math problems and compositions in the third grade of primary school, so that students can have a meaningful winter vacation and Spring Festival.

Mathematics is a subject closely related to the people, and the universe it discusses is far more magnificent than the so-called universe in reality. Generally speaking, the universe is only a three-dimensional space, while mathematics has established four-dimensional, five-dimensional or even n-dimensional spaces, and the space of set theory is over-limited.