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Anonymous
Add the binary equivalent of 3 (0011) to each digit of the number in binary format. Ex: 1. Excess-3 of 6 is 0110(6) + 0011(3)= 1001(9) 2. Excess-3 of 12 is 0001 0010 + 0011 0011 = 0100 0101 (45)
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