There used to be several kinds of plus signs, but now the "+"sign is widely used. ? The mathematical symbol "+"comes from the Latin "et" (meaning "and").

Sixteenth century, Italian scientist? Nicolo Tartaglia uses the first letter of the Italian word "plu" (meaning "plus") to mean "plus", and the grass is "μ", which finally becomes "+". The number "-"is derived from the Latin word "minus" (meaning "minus"). It was abbreviated to M at first, but later it was simplified to "-"because it was written quickly.

It is also said that wine merchants use "-"to indicate how much a barrel of wine costs. After the new wine is poured into the vat, a vertical line is added to the "-",which means that the original line is erased, thus becoming a "+"sign.

/kloc-In the 5th century, the German mathematician Wei Demei officially determined "+"as the plus sign and "-"as the? Negative sign