Archived App (Last seen on 22 Apr 2026)
This is an archived listing of the app previously available on the App Store.Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.
About
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.
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What's New in AddThree
1.0
October 9, 2014
This app has been updated by Apple to display the Apple Watch app icon.
