價格：免費
更新日期：2017-08-27
檔案大小：2.0M
目前版本：1.0
版本需求：Android 4.0 以上版本
官方網站：http://www.codeduo.de
Email：info@codeduo.de
聯絡地址：Grevenstr. 65 51107 Cologne Germany
Learn addition and subtraction using double ten frame. You can change the equation by selecting random arguments, switching between plus and minus signs and also by reordering dots. Check your solution and correct yourself by clearing the wrong answer.
