so they all start with '8.0'so we can cross out that part and we are left with
8, 8.1, 9, 0.8
so 8.1 is more than 8 because it has '0.1' more than 8
9 is greater than 8
0.8 is less than all of them so
the order from smallest to greatest (when we put the 8.0 back in) is
8.008, 8.08, 8.081, 8.09