what is a addend
Definition of Addend. Addend is a mathematical term that refers to the numbers being added together in an addition problem.The word addend was first used in the early 1900's and comes from the Latin word 'addendus' which means 'to be added.'.nstructor: Jennifer Beddoe. In mathematics, an addend is any number that is added together in an addition problem. This lesson will define the term addend in greater detail, give some examples, and finish with a quiz to test your knowledge.