Add the equation by using 2's compliment, Computer Engineering

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Add 20 and (-15) using 2's complement ?

Ans. Addition of 20 and (-15) by using 2's complement as

2360_Add the equation by using 2s compliment.png

(20)₁₀ = 1 0 1 0 0 (16)₁₀= 1 0 0 0 0

(-16)₁₀ = 0 1 1 1 1(1's Complement)
                          +1(2's Complement)
           ---------------------
                  1 0 0 0 0
           ---------------------
Thus,

1081_Add the equation by using 2s compliment21.png

Because the MSB of the sum is 0 that means the result is positive that is +4.

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