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Q.) Carry out BCD subtraction for (68) – (61) using 10’s complement method.

(A) 00000111
(B) 01110000
(C) 100000111
(D) 011111000
Correct answer : Option (A) - 00000111

Explanation: 
 first the two numbers are converted into their respective bcd form using 8421 sequence. then binary subtraction is carried out.

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