please solve with explenation

18. [0.5] Suppose that we use the 10 's complement of X to represent X. Show that AB can be performed as A + (-B); i.e., by taking the 10's complement of B (00980099) and adding it to A (90009951) (and ignoring the carry out of the 8-digit decimal values). AB=(1)89029851AB=(1)89018941AB=(1)88008951AB=(1)89108941