價格：免費
更新日期：2017-04-13
檔案大小：9.2 MB
目前版本：2.1
版本需求：需要 iOS 10.0 或以上版本。與 iPad 相容。
支援語言：英語
Subtraction Skill Builder is an excellent app.
It has a scratch paper feature, so children can work out the problems on the screen.
This subtraction app is terrific for children in grades 1, 2, and 3.
This is a wonderful app for all children who are having trouble with subtraction.
Great for mastering subtraction.
支援平台：iPad