#!/bin/bash

otonine="$(seq 0 9)"
onetonine="$(seq 1 9)"

for i in ${onetonine}; do
	for j in ${otonine}; do
		k=$(( ${i} + ${j} ))
		echo -n "${i}${j} - (${i} + ${j}) = "
		echo "$(( ${i}${j} - ${k} ))"
	done
done