Flash Mental Arithmetic free

※ This document has been translated using Google.

This app is a simple mental arithmetic flash.
You will calculate the number displayed on the screen.

The following settings are enabled.
①出題数※Number of digits to be displayed.
②数字桁数※Number of digits.
③出題表示間隔※Time the problem appears.
④引き算※Your inclusion or subtraction problem.
⑤カンマ※You whether or not to display a comma.
⑥桁合わせ※Whether you match the digits.
⑦効果音※Whether you play a sound effect.