Yanshuf is an application to help learn simple math. You choose the type of equation that you want to receive, and then you enter your answer. The application will then tell you if you were correct or not, and will show you the whole final equation with the correct answer. You can play over and over again. Each time you enter a correct answer you gain a point. You can then see the total sum of your points for the session.
You have to install the MIDP Java Profile on your Palm before running this application. It can be downloaded from sun for free at http://java.sun.com/products/midp4palm/