價格：免費
檔案大小：25.6 MB
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
This app is an ideal tool for learning how to operate an abacus.
For inspiration how to add, subtract, multiply, divide, and square numbers with it, have a look at https://www.youtube.com/watch?v=j32KcnfAH_o.
A base-10 abacus takes some screen space. You might want to hold your device in landscape orientation. All recent devices (size > 720 pixels) are supported.
No ads, no in-app purchases, no bells and whistles. Ideal for kids.
支援平台：iPhone, iPad