Show the procedure twos complement subtraction, Electrical Engineering

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Q. Show the procedure twos complement subtraction?

Two's complement subtraction is the binary addition of the minuend to the 2's complement of the subtrahend (adding a negative number is the same as subtracting a positive one).

For example,

7 - 12  =  (-5)      

    0000 0111  =  +7

 + 1111 0100   =  -12

--------------------------------------------------------------------------------

    1111 1011 = -5


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