價格：免費
檔案大小：56.2 MB
版本需求：需要 iOS 6.1 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
Created and tested by math educators, AddThree helps students learn how to add three digit numbers. Kids can work independently, or with a parent, learning how to make a visual connection with the idea of “crossing ten” and “regrouping". It’s a powerful tool for teachers and parents to engage children and make learning a process they can enjoy together. Amazingly direct and effective, AddThree gives kids an edge.
*Pre-Requisite to the OverTen app.
支援平台：iPhone, iPad