Adio is a simple sums practice program, primarily created for Welsh speaking children. The application supports: - Adio (add) - Tynnu (take away) - no negatives, only big - small. - Lliosi (multiply) - Dwbl (double) - Hanner (half) - no odds, only even numbers. Use the keyboard to enter the correct answer or reveal the answer with the button (Ateb). Choose the level: 10, 20, 50, 100, 1000 to set the numeric range of the values to use. Good luck!