It is difficult to listen to a formula and do mental arithmetic. This is because it requires memory. Use this app to train your mental arithmetic using audio.

[Overview]
Listen to the audio of the calculation and enter your answer.
After a set number of drills have been answered, the number of correct answers will be displayed.
Numbers up to 5 digits are supported.

[Ending the game]
After a set number of drills have been answered, the game will end.
You can end the game by pressing the END button even during the game.

[Game settings]
1.Arithmetic formula:
You can choose between addition and subtraction.
2.Number of drills:
You can freely set it from 5 to 40.
3.Difficulty level:
You can freely set it from 1 to 20.

[Audio library]
Voice By ondoku3.com