When performing subtraction by addition in the 2’s-complement system ____________
A. The minuend and the subtrahend are both changed to the 2’s-complement
B. The minuend is changed to 2’s-complement and the subtrahend is left in its original form
C. The minuend is left in its original form and the subtrahend is changed to its 2’s-complement
D. The minuend and subtrahend are both left in their original form
Answer:C
When performing subtraction by addition in the 2’s-complement system ____________
A. The minuend and the subtrahend are both changed to the 2’s-complement B. The minuend is changed to 2’s-complement and the subtrahend is left in its original form C. The minuend is left in its original form and the subtrahend is changed to its 2’s-complement D. The minuend and subtrahend are both left in their original form
Explanation: When performing subtraction by addition in the 2’s-complement system, the minuend is left in its original form and the subtrahend is changed to its 2’s-complement. It is then added to the minuend. If the result has carry, then it’s dropped and that’s the final answer. Else, if the result has no carry, then the result is again converted to it’s 2’s complement form and that’s the final answer with a ‘negative’ sign.