answers: operation
context: Adder–subtractor In digital circuits, an adder–subtractor is a circuit that is capable of adding or subtracting numbers (in particular, binary). Below is a circuit that does adding "or" subtracting" depending on a control signal. It is also possible to construct a circuit that performs both addition and subtraction at the same time. Having an "n"-bit adder for "A" and "B", then . Then, assume the numbers are in two's complement. Then to perform , two's complement theory says to invert each bit with a NOT gate then add one. This yields , which is easy to do with a slightly </s> Subtraction Subtraction is an arithmetic operation that represents the operation of removing objects from a collection. The result of a subtraction is called a difference. Subtraction is signified by the minus sign (−). For example, in the adjacent picture, there are apples—meaning 5 apples with 2 taken away, which is a total of 3 apples. Therefore, the "difference" of 5 and 2 is 3, that is, . Subtraction represents removing or decreasing physical and abstract quantities using different kinds of objects including negative numbers, fractions, irrational numbers, vectors, decimals, functions, and matrices. Subtraction follows several important patterns. It is anticommutative, </s> e.g. a $10.00 bill. In grade schools, students are sometimes taught the method of complements as a shortcut useful in mental arithmetic. Subtraction is done by adding the ten's complement of the subtrahend, which is the nines' complement plus 1. The result of this addition used when it is clear that the difference will be positive, otherwise the ten's complement of the addition's result is used with it marked as negative. The same technique works for subtracting on an adding machine. Method of complements In mathematics and computing, the method of complements is a technique used to subtract one number
question: a calculation from input values such as add subtract multiply and divide