A quantity to be added to another, also called a summand. For example, in the expression , , , and are all addends. The first of several addends, or "the one to which the others are added" ( in the previous example), is sometimes called the augend.
Addend
See also
Addition, Augend, Plus, RadicandExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Addend." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Addend.html