
Number System | 2.59
Carry 1 1 1 1
Augend 0 1101 1010 1101 .1110
Addend 0110 0110 0110 .0110
Sum 1 0100 0001 0100 0100
1 4 1 4 .4
Explanation:
• First digit is more than 1001, so add (0110)
• Second digit is more than 1001, so add (0110)
BCD
• Third digit is more than 1001, so add (0110)
BCD
• Fourth digit is more than 1001, but carry is 0 so add (0110)
BCD
2.11.2 | BCD Subtraction
BCD subtraction is performed preferably by 9’s complement or 10’s complement method.
Best is 10’s complement method because it gives only zero. Conventional method requires
conversion from binary digit value to BCD digit value which is explained below
• Subtract subtrahend ...