Mathematical addition, subtraction, multiplication and division symbol
French mathematician Soso used some symbols in his three arithmetic papers written in 1484, such as D for addition and M for subtraction. These two symbols first appeared in the commercial speed algorithm written by German mathematician Weidemann. He used "+"for excess and "─" for deficiency. Pass 1565438+. 1544, German mathematician Steefel formally used "+"and "─" to express addition and subtraction in integer arithmetic, and these two symbols were gradually recognized as real arithmetic symbols and widely used.
The symbol "X" for multiplication was put forward by the British mathematician Oughtred. He introduced this symbol in Key to Mathematics published in 163 1 year. It is said that this notation is derived from the addition symbol+,because multiplication is developed from the addition of the same number. Later, Leibniz thought that "X" was easily confused with "X" and suggested using it.
The division symbol "⊙" was first used in Varis, England, and later popularized in England. In addition to the original meaning of "fen", the horizontal line in the middle of the symbol "⊙ ⊙" separates the upper and lower parts, which vividly represents "fen". At this point, the four operation symbols have been completed, which is far from being widely adopted by all countries.
"Addition, subtraction, multiplication and division (+,-,x (? ), ⊙) and other mathematical symbols were formed after a long period of development and were widely used in17th century. The prefix p of the English plus sign is used as the addition symbol. 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". As a result, "et" gradually became "+". The same is true of subtraction, which uses the prefix m of minus in English, and gradually becomes "-"for the convenience of sketching. After the appearance of "+"about 65,438+000 years ago, Oughtred in Britain first used "×" as the multiplication sign. It is said that multiplication symbols are derived from addition symbols. 13×5 is equal to13+13+13+13. That is to say, the multiplication operation is a special addition operation, so if the addition symbol "+"is slightly changed, it will become the current multiplication symbol "×" and it will also be recognized. However, some people think that ""is easily confused with decimal point, and still insist on using the X symbol. The symbol "∫" representing division was first used in Varis, England, and later popularized in England. In addition to the original intention, such as 100 apples to 10 children, how much does each child get? That is 100÷ 10. The horizontal line in the middle of the symbol separates the upper and lower parts, which vividly represents the "point". But in Germany, Leibniz used ":"to represent the division symbol, which has been used ever since. Later, people also used ":"to represent the ratio because of its significance.
Edit a song with the same name.
add, subtract, multiply and divide
Song: addition, subtraction, multiplication and division
Singer: Liu Xiaohui
There is a lot of tenderness in your eyes, and you need my help very much.
That body can't sit at night
Know what you want in your heart.
Stir the river with me with that sweet talk
Why are you sitting next to me?
Hot air will bring disaster.
I want you to think about who is an idiot tonight.
You should be more self-disciplined and self-respecting. Don't think too much.
Add some real care and subtract some stupid ideas.
Let you lean over and know how to sit still.
There is a little fire left. Please take advantage of friendship.
How does it feel to get rid of the free and easy feeling?
Add some real care and subtract some stupid ideas.
Is the best help you can give.
Walk slowly and start a new story.
I can't help you if you don't follow the rules.
Song 2
Song: addition, subtraction, multiplication and division
Singer: Flower Band Album: I am your Romeo.
I can be sincere but forget to pay.
You can give but forget to forgive.
Open the window and wait for the sunrise together.
Melting cold, only inexplicably moved.
In our story, it's like arithmetic we do.
I add you to equal the whole perfect sky.
I subtract you and walk with the stars.
Multiplication and division are equal to an eternal rainbow.
I add you to equal the whole perfect sky.
I subtract you and walk with the stars.
Multiplication and division are equal to an eternal rainbow.
I know I was wrong, but I forgot to make up for it.
You cherish it but forget to give in.
When you and I pass through each other's pupils
Go into your heart and never mention the ending again.
In our story, it's like arithmetic we do.
I add you to equal the whole perfect sky.
I subtract you and walk with the stars.
Multiplication and division are equal to an eternal rainbow.
I add you to equal the whole perfect sky.
I subtract you and walk with the stars.
Multiplication and division are equal to an eternal rainbow.
This time ~
Our story is like an arithmetic problem.
Only you and I understand.
Only inexplicably moved.
I fell in love.
Dream of you.
I add you to equal the whole perfect sky.
I subtract you and walk with the stars.
Multiplication and division are equal to an eternal rainbow.
I add you to equal the whole perfect sky.
I subtract you and walk with the stars.
Multiplication and division are equal to an eternal rainbow.
I add you to equal the whole perfect sky.
I subtract you and walk with the stars.
Multiplication and division are equal to an eternal rainbow.