Well, both decimals will have the same answer, which is 8.56, so one decimal is 8.56, the other is 8.650, so, if we add a 0 in 8.56, we will have 8.560, just like the other decimal, another thing is that you can take a 0 away from 8.560, to get 8.56, just like the other decimal that had 8.56.
Hope this helped!
Nate
