價格：免費
更新日期：2018-10-17
檔案大小：35.5 MB
目前版本：2.0.1
版本需求：需要 iOS 10.0 或以上版本。與 iPad 相容。
支援語言：英語
Practice addition and subtraction facts with sums and minuends to 20. Or work with "More Than" and "Less Than" sentences. For example:
What number is 5 more than 6?
What number is 3 less than 7?
Use a number line as a tool for solving the problems.
Adjust the options to include any combination of Result, Change, or Start as the unknown quantity. Select the facts to practice.
支援平台：iPad