Addition, subtraction, multiplication, division (+,-,× (), ⊙ (:) and other mathematical symbols are the most familiar symbols for each of us, because we can't do without them not only in mathematics learning, but also in almost every day's daily life. Although they are so simple, they didn't all come into being until the middle of147th century. In 148, the French mathematician Soso made the symbols of addition, subtraction, multiplication and division in mathematics. For example, d stands for addition and m stands for subtraction. These two symbols first appeared in the commercial speed algorithm written by German mathematician Weidemann. He used "+"for excess and "-"for deficiency. Up to 15 14, Heck of the Netherlands used "+"for addition and "-"for subtraction for the first time, and 40016.0000000000105 German mathematician Stifel officially used "+"and "-"in integer arithmetic. The symbol "×" representing multiplication was first created by British mathematician Oughtred. He introduced this symbol in Key to Mathematics published in 163 1 year. It is said that it is composed of the addition symbol+. Because the multiplication operation plus developed from the addition operation of the same number, Leibniz later thought that "××× year × month × day × month × day × month × day × month × day × month × day × month × day × month × day × month × day × month × day × month × day × month × day × month × day × day × month × day × month × day × month × day × month × day × month × day × month × In Germany, the word "et" equivalent to the English word "he" is used. With the prosperity of European business, it is not too much to write "et". So "et" gradually becomes "+". The same is true of subtraction, which uses the prefix m of English MINUS sign, and gradually becomes "-"for the convenience of sketching. About 100 years after "+"appeared, Oughtred in Britain used "×" as the multiplication sign for the first time. It is said that the multiplication sign is derived from the addition sign because the multiplication operation is developed from the addition operation of several identical numbers. Such as13+13+13+65438+13+65438. As a multiplier, like this, "?" This has also been recognized. But some people think "?" The symbol "∫", which is easily confused with the decimal point, still insists on the division of X up to now. It was first used by Varis in Britain and later popularized in Britain. The original intention of division is to divide, for example, 100 apples to 10 children, and how much each person gets is100/0. In Germany, Leibniz used ":"to represent the division symbol, which has been in use ever since. Later, people also used ":"to express ratio, because ratio and division have the same meaning. "