What is the term for the input on an adder that contributes to the sum?

The term for the input on an adder that contributes to the sum is known as an addend. In basic arithmetic, when you are performing addition, each of the numbers being added together is referred to as an addend. For instance, in the equation 3 + 5 = 8, both 3 and 5 are considered addends, and they collectively contribute to the final result (the sum).

Understanding this concept is fundamental in arithmetic as well as in the design of digital circuits that perform addition, where specific inputs are first recognized and processed as addends to generate the desired output. The other terms listed refer to different mathematical functions: a minuend refers to the number from which another number (the subtrahend) is subtracted, while borrow pertains to a concept used in subtraction.