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Addition involving eight-bit 2's complement numbers and indicating overflow.


Active member
Sep 13, 2013
Perform the following operations involving eight bit 2's complement numbers and indicate whether arithmetic overflow occurs.

00110110 + 01000101 = 01111011 Overflow: there is none because we are adding to positive numbers.

Did I do this correctly?


Well-known member
MHB Math Scholar
Jan 30, 2012
The sum is correct, and there is indeed no overflow, but not because you are adding two positive numbers. When you add 1 to 01111111, there is an overflow.