價格：免費
檔案大小：1.5 MB
版本需求：系統需求：iOS 12.4 或以後版本。相容裝置：iPhone、iPad、iPod touch。
支援語言：英語
Improve addition skills. Starts with numbers ranged from 0 to 9. In 90 seconds solve as many questions as possible. Best place for practicing addition and improving addition skills. When time is up, it shows how many questions you got right and how many you got wrong and the total percentage.
支援平台：iPhone, iPad