價格：免費
檔案大小：63.7 MB
版本需求：需要 iOS 8.0 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
Practice subtraction facts with silly graphics and simple game play. Drop seadragons, seahorses, pipefish, dragons, or cakes with subtraction problems in the container to match the answer. No time limit and misses are free. 10 levels of increasing difficultly or build a custom level.
支援平台：iPhone, iPad