This app can help students or children to train their fast computing ability, but it is very difficult! So I think it's also a sport, just the brain.<br>This app is divided into several training modes. The training mode can be selected and the app will switch automatically during training.<br>Among them, there are not only four basic training of addition, subtraction, multiplication and division, but also many operations, bracket operations, and many and interesting training styles. Can effectively enhance people's interest in training.<br>In addition, you can also shake your phone in the training interface to return to the home page. Note that there is no use shaking in other pages.
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