The plus sign and the minus sign belong to the symbols of the first-level operation in mathematics, while the plus sign and the minus sign are unary operation symbols.

2, the scope of application is different

The plus sign and the minus sign are just two of the four operation symbols used to add and subtract numbers in mathematics. In mathematics, the plus sign and the minus sign are the forms of the numbers themselves. In addition, they also have special meanings in physics.

3. Different historical sources: the plus sign and the minus sign are the two earliest mathematical operations mastered by human beings. As early as ancient Egypt, Ammers papyrus recorded these two symbols. The plus sign and the minus sign originated from Johannes Videman's paper, and he used "+"and "-"to represent surplus and deficit in 1498.

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