Practicing mental arithmetic in 4th class. Simple and self-explanatory app for practicing math problems. You have to solve one task out of ten in 30 seconds. At the end of the ten tasks, you will receive a summary of the success of the tasks.

Exercises supported by the mental arithmetic app:
➕ Add - plus
➖ Subtract - minus
✖️ Multiply - take it
➗ Divide - divide by