The writing order is:? Point → horizontal → point (symmetrical point below, two points in the middle of horizontal line as far as possible)

The division symbol indicates that the number A is divided by the number B, and sometimes it is replaced by a horizontal line or a diagonal line, or for example, the number A is divided by the number B and written as ab or ab and A/B. ..

Division symbol, mathematical symbol, is a symbol composed of a short horizontal line and two points on both sides of the horizontal line, which is mainly used to represent division operation in mathematics. Division can be applied to many fields such as mathematics, physics and chemistry.

：

1544, German mathematician Steefel used one or a pair of brackets as the symbol of division in his Integral Arithmetic, such as 8)24 or 8)24 (indicating 24 ÷ 8; Oughtred uses a)b(c) to represent b÷a = c；; J. Mahon (170 1 year) is expressed by d) a+b-c (a+b-c) ÷ d.

In 1545, Stiefel changed the capital German letter D to stand for division. Later, Steven also adopted this symbol, while Gorimad (175 1) used inverted letters to indicate division, such as 12 4=3 and a2b2a2. In addition, in "Principles of Mathematics" published by 1790, division is represented by flat lowercase letters.

Today's division sign is called the Lahn symbol, which was quoted as a division sign in an algebra book published by Swiss J.H. Rehn in 1659.

By 1668, the English version of his book became popular and has been in use ever since. In addition, Leibniz used the colon ":"for the first time in one of his papers "On Art Combination", which later became popular and is still in use today.

References: Division (symbol) _ Baidu Encyclopedia