價格：免費
檔案大小：1.5 MB
版本需求：系統需求：iOS 8.0 或以後版本。相容裝置：iPhone、iPad、iPod touch。
支援語言：英語
Practice simple to difficult arithmetic problems at your fingertips endlessly without internet connection! You can check your answers as you go and reveal the answer if the problems get too difficult.
There will never be ads, and all future updates will be free!
支援平台：iPhone, iPad