The plus symbol is used in math to represent the addition operator. Typically, the symbol is used in an expression like this:
In plain language, this expression means the number two plus the number seven.
The plus-minus symbol is used in math to represent the error in calculations. It is also used to show that there are both positive and negative results from a calculation.
Addition is a basic operation in mathematics for combining two numbers together. It is a binary operation denoted with the plus symbol with an expression on the left and an expression on the right.
Vector addition is the operation of adding together two vectors in mathematics.