Addition

right|thumb|upright=0.5|alt=Diagram: One column containing three apples, and another column containing two apples; put together, there are 5 apples in total.|3 + 2 = 5 with apples, a popular choice in textbooks

In mathematics, summation is the addition of a sequence of numbers, called addends or summands; the result is their sum or total. Beside numbers, other types of values can be summed as well: functions, vectors, matrices, polynomials and, in general, elements of any type of mathematical objects on which an operation denoted "+" is defined.

Automatic mechanical calculator designed to tabulate polynomial functions

collective term for the four mathematical operations of addition, subtraction, multiplication and division

mathematical symbol: ±

example of Party logic presented in 1984

mathematical symbols used to represent the notions of positive and negative as well as the operations of addition and subtraction; mathematical symbols that specify sign of a number

sum of a number's digits

measurement scale in which quantity values can be ranked and subtracted from each other