I agree with all those who said the facts need to be memorized. One way that has really helped my right brain thinker and me is to make the problems into a story with a picture and lots of color around it. Change the color of the numbers or make them into people/objects. Anything that will help them to picture the problem. There are programs out there that do this for you or you can just get your child involved, and have them come up with the story/picture. It is a lot of fun, and it really makes them stick, without a struggle.