FlashLearning -multiply 9x9-

用于学习 9 x 9 乘法的应用程序，如抽认卡。

Application to learn 9 x 9 multiplication like flashcards. When you click on the screen, you will be presented with one problem after another. Repeated learning will enhance your memory.

If you like the application, you can use all functions (all questions) by paying only once. Thank you.