價格：免費
更新日期：2015-12-03
檔案大小：15.3 MB
目前版本：1.6.4
版本需求：需要 iOS 6.0 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
Subtraction ! ! is a great way to learn and practice subtraction. From simple 1-digit problems to more advanced multi-digit problems, Subtraction ! ! will provide the user the necessary guidance and practice to master subtraction.
Features of the lite version:
1) 1 to 3 digits in each number
2) Tutorial animation speed setting
3) User settings for up to 5 users
4) "Play Tutorial" button to show the step by step solution for each problem
5) "Hint" button for instructional guidance on current step
6) "Help" button for automatic completion of current step
The full version has more features:
1) 1 to 6 digits in each number
2) Tutorial animation speed setting
3) Random or custom entered problems
4) User settings for up to 5 users
5) "Play Tutorial" button to show the step by step solution for each problem
6) "Hint" button for instructional guidance on current step
7) "Help" button for automatic completion of current step
If you like this app, please consider giving it a rating. Your support will help keep the updates coming! Thank you for your support!
支援平台：iPhone, iPad