Playing learn! Flash mental calculation of the series. You answer the total by adding the digits that are displayed one after the other on the screen.

Flash mental calculation app to answer the total by adding the digits that are displayed one after the other on the screen.

[Training mode]

In the training mode you can play by changing the following settings.

- Digit number

· Display interval

- Number of questions

You can play anyone until the difficult problem from a simple problem.

[Challenge Mode]

You can challenge the rankings in four of the degree of difficulty in the challenge mode.

Aim the top ranking in the degree of difficulty that suits you!