This document discusses 1's and 2's complement in binary numbers. 1's complement involves flipping all the bits in a binary number to perform subtraction. 2's complement is obtained by adding 1 to the 1's complement. As an example, it shows subtracting 1010 from 1111 in binary using the 1's and 2's complement methods.

1. NAME CH.SHIRAZ
Presenting presentation to….
Sir Saleem

2. 1’S AND 2’S COMPLEMENT

3. COMPLEMENT
A bit with opposite value to the given one is know as Complement in
Computer Science

4. 1’S COMPLEMENT
Subtraction of binary numbers
using the 1’s complement method
allows subtraction only by
addition.

5.  To subtract a smaller
number from a larger
number, the 1’s
complement method is as
follow.

6. SUBTRACT (1010)2 FROM (1111) 2

7. Subtraction of a large number from a
smaller one by the 1’s complement method
involves the following steps
a) The answer is the 1’s complement of the
result and is opposite in sign. There is no
carry.

8. 2’S COMPLEMENT
The 2’s complement of a binary
number can be obtained by adding 1 to
its 1’s complement.

9. SUBTRACT (1010)2 FROM (1111) 2