Learning with random numbers:
Here you can choose a number range but on the right side. The cube (right) is then used to generate a random number within a certain range. With the button showing a thumb you get the result. Again, you can turn the sound on or off with the button that shows an ear. Also, you can change the color of the answer by the button on top left. This learning is the last phase. You can limit the numbers to the area that you still have to practice.