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What are the operation symbols in mathematics?
There are plus sign (+), multiplication sign (× or), subtraction sign (-), division sign (÷ or/), logarithm (log, lg, ln, lb), ratio (:), union (∩), intersection (∩) and root of two sets.

+was created by German mathematician Wei Demei in15th century. Adding a vertical line to the horizontal line indicates an increase. "-"was also created by Wei Demei. Subtracting a vertical bar from the plus sign indicates a decrease.

"X" was first used by American mathematician Audrey in18th century. It means another way to increase, so write the plus sign on the diagonal. ⊙ was created by Swiss Hannah in18th century. It means decomposition, separating two points with a horizontal line. The number "=" was invented by16th century British scholar Colder.

Extended data:

Multiplication is a simple operation of addition and division is a simple operation of subtraction.

Subtraction and addition are reciprocal operations, and division and multiplication are reciprocal operations.

Appendix+Appendix = Sum

Negative-negative = difference

One addend = and-the other addend.

Subtraction = minuend-difference

Subtraction = difference+subtraction

Factor × factor = product

One factor = product ÷ another factor

Dividend = quotient

Divider = Divider

Dividend = quotient × divisor

Baidu encyclopedia-mathematical symbols