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8 minus negative three or 8--3 equal positive 11. The double negative converts the minus sign into a plus sign and the negative into a positive.
Plus, minus, division sign, multiplication sign, and equal sign... +,-, /, x, =
The person who invented the plus sign is the same as the minus
plus sign (+), minus (-), number (#), decimal point for decimals and money, percent (%), dollar sign ($), equal (=)
SymbolName+addition sign, plus sign-subtraction sign, minus signx or ⋅multiplication sign÷ or /division sign=equal≠not equal<less than>greater than≤less than or equal to≥greater than or equal to#number sign( )parentheses&and (ampersand)%percentπpi|x|absolute value of x√square root!factorial±plus or minusˆcaret - to the power of