163 1 year, in his book Clavis Mathematicae, the multiplication of two numbers was first expressed by x, which is a modern multiplication symbol, and later it became more and more popular. In the letter 1698 to johann bernoulli on July 29th, Leibniz proposed to use points to represent multiplication, so as to prevent the X symbol from being confused with the letter X.
Multiplication is one of the earliest operations, which appeared in the earliest written records of human beings. Taboo numbers in punctuation marks are used to replace inconvenient words. Fan and other literary works. Used to replace parameters that need to exist, but do not need to be clearly stated, often shared with ○□ and △ * * *.
Brief introduction of William Oughtred
British mathematician who had a great influence on the development of mathematical symbols. Born in Buckinghamshire, died in Surrey. Graduated from King's College, Cambridge University. 1680 became the rector of Elbury parish, 1628 was hired as a tutor. ? The Key to Mathematics was published in 163 1, which had a great influence in Europe and Newton once gave a high evaluation.
Oughtred had a great influence on the development of mathematical symbols. He used a large number of symbols instead of complicated arithmetic descriptions. In his book Keys to Mathematics, he first used x to represent the multiplication of two numbers, which is a modern multiplication symbol, and later it became more and more popular.