價格：免費
更新日期：2018-09-24
檔案大小：20.9 MB
目前版本：1.1
版本需求：需要 iOS 8.0 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
Practice addition & subtraction problems with negative numbers!
Three difficulty levels available, where each level contains unlimited practice problems!
Suitable for 4th, 5th and 6th Grade Math.
Benefits & Features
- Learn / practice addition and subtraction with negative numbers
- Improve mental math skills
- Suitable for both individual work & classroom use
- Easy to use user interface
支援平台：iPhone, iPad