Subtraction of Unsigned Numbers using :

$1\text{'}$s comp.

$2\text{'}$ comp.

A$.[1010-1000{]}_2$

B$.[1000-1010{]}_2$

Subtraction of signed Numbers using :

$1\text{'}$s comp.

$2\text{'}$ comp.

A$.[1010-1000{]}_2$

B$.[1000-1010{]}_2$