1. Find Subtraction of 110 and 101 using 1's complement method

Here A = 110, B = 101.
Find A - B = ? using 1's complement
First find 1's complement of B = 101

Note : 1's complement of a number is obtained by subtracting all bits from 111.
1's complement of 101 is

	1	1	1
-	1	0	1
	0	1	0

Now Add this 1's complement of B to A

1	1
	1	1	0
+	0	1	0
1	0	0	0

Hints : (Move mouse over the steps for detail calculation highlight)

Step-1 `=0+0` `=0+0` `=0` `=2xx0+0` `=0_2` `:.` Sum`=0`	Step-2 `=1+1` `=1+1` `=2` `=2xx1+0` `=10_2` `:.` Sum`=0` and carry`=1`
Step-3 `=1+1+0` `=1+1+0` `=2` `=2xx1+0` `=10_2` `:.` Sum`=0` and carry`=1`

The left most bit of the result is called carry and add it to the rest part of the result 000.

	0	0	0
+			1
	0	0	1

So answer is 001