Phyllis, the confusion comes about because I was taught in school to do it so that the answer is 1. I taught my children to do it so that the answer is 1.
Today at school I asked a another lady that I worked with about this problem. She is also attending college at the moment and a lot of her work involves math. When I presented the problem to her, she immediately said that the answer was 9. I asked her why and told her that the way I had been taught to do it, the answer should be 1. What she told me really surprised me, because you are right - the rules of math should not change. Tara told me that the way she was taught to do this type of problem in high school was different than the way she was taught to do it in college. In high school, she was taught to do it so that the answer would be 1. When she did these same problems in college, she missed them all. Finally, she asked her professor to explain to her why she was missing them and he told her that they had changed the rules, the answer was now 9.
Because the rules of math should NEVER change is why I am so adamant that the proper answer is 1. What good does it do us to learn how to do all of this math if they can just up and change the rules on us? I realize now that it can be done either way, but I really feel that is wrong - it should only be able to be done in one way.