If $,A=299,B=159$

$($a$)$ Perform A$-$B using $9\text{'}$s complement

$($b$)$ Perform B$-$A using $9\text{'}$s complement

$($c$)$ Perform A$-$B using $2\text{'}$s complement

$($d$)$ Perform B$-$A using $2\text{'}$s complement