2s complement addition and subtraction

4

+ 3

7

0100

0011

0111

– 4

+ (– 3)

– 7

1100

1101

11001

4

– 3

1

0100

1101

10001

– 4

+ 3

– 1

1100

0011

1111

• Simple addition and subtraction

  • simple scheme makes 2s complement the virtually unanimous choice for integer number systems in computers

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