This nice little math program is fun enough that you will forget you are doing math. When I was a kid I played this game hundreds of times and never let it bother me that this is an educational game.
Math Mileage is a decent racer in and of itself. It's kind of like a slowed down pole position, but rather than driving around obstacles, you have to choose the right fork in the road to take in order to reach your destination. You have a destination value which you are trying to reach by addition and subtraction. The graphics on this game are great. There are different types of terrain, and you can even drive at night and use the little headlights on your car. This really is a nifty math program that you should try.