99x99まで暗算でスラスラ(hard) app for iPhone and iPad

4.8 ( 6528 ratings )

Lifestyle Education Entertainment
Developer: Canalier

1.99 USD

Current version: 1.1, last update: 7 years ago
First release : 18 Sep 2014
App size: 11.37 Mb

This is for learning and practicing mental arithmetic from 11x11 to 99x99 in a easy way.
If you are not doing mental arithmetic habitually, dont worry. This is an easy method of only 1 pattern, which you will get used to soon, and can make it fluently.
With only 2 problems to answer for 1 practice, you can launch it anytime.
Its not only for children and students, but also for businessmen or elderly persons for brain workout.