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Subtract -27 from 68 using 2's complements.
Ans. By using 2's complement 68-(-27)= 68-(-27)
2's complement representation of 68 = 01000100(64+4)2's complement representation of - (-27) = 00011011 = + 2711100101 =-27 in 2's complementHere add 68 and 27 68 0 1 0 0 0 1 0 0 -(-27) + 0 0 0 1 1 0 1 1
-------------------------------------- 95 0 1 0 1 1 1 1 1 1
---------------------------------------
Means that is equal to +95.
Perform the - 48 - 23 operations using the 2's complement method. Ans. - 48 - 23 = - 48 + (-23) -48 = 1 1 0 1 0 0 0 0 -23 = 1 1 1 0 1 0 0 1 = -71
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