價格：免費
更新日期：2016-10-26
檔案大小：13.8 MB
目前版本：1.1
版本需求：需要 iOS 9.3 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
Flashcard type drills for children recently introduced to subtraction.
Select a number 1 through 12, and random cards will be presented of that number subtracting from another number.
Get 1 point for each correct question.
For positive reinforcement, the character says things like "yes" and "I knew it" for correct answers. (There is no audio for wrong answers.)
支援平台：iPhone, iPad