價格：免費
檔案大小：6.8 MB
版本需求：需要 iOS 3.2 或以上版本。與 iPad 相容。
支援語言：英語
"Aardy's Subtraction Fun" offers fun ways to learn and practice basic number subtractions.
Parents can create different levels to suit different learning needs, or join in to play and have fun with their kids.
In this version, we have included the following features:
1. Subtracting from one to twenty
3. Randomized formula to keep your children engaged
3. Highscores to keep track of progress and achievements
支援平台：iPad