Math Help - Binary subtraction using 2's complement

1. Binary subtraction using 2's complement

Subtract 1010 from 1110 using 2's complement subtraction.

I got the following:

1110
0001
+1
0010

1010
0010
1100

0100

1011

1011
+1
1100

MSB = -

So answer = 0100

1010 from 1110 = 0100

Is this correct?

2. Hi gary223,

To subtract 01010 from 01110 in binary,
we write the 2's complement of 01010 and add instead.
Invert all the bits of 01010 and add 1 gives 10101+0001=10110

We add 10110 to 01110

$\color{blue}11100\ carry$
$01110$
$10110$
------
$00100$