Question

Perform the following operations using 2's complement method. Use 8-bit
representation of numbers.
(80)16 - (64)16 = (?)16
the following .
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Answer 1

Answer:

For example, an 8-bit unsigned number can represent the values 0 to 255 (11111111). However a two's complement 8-bit number can only represent positive integers from 0 to 127 (01111111), because the rest of the bit combinations with the most significant bit as '1' represent the negative integers −1 to −128.