價格：免費
更新日期：2016-05-19
檔案大小：6.9 MB
目前版本：1.0
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
Papy's Mini-Calculator.
The method we have used to introduce children to mechanical and mental arithmetic employs the distinct advantages of the binary system over other positional systems, while at the same time taking account of the decimal environment in which we are immersed.
Inspired by some work of Lemaitre, this variety of two-dimensional abacus uses the binary system on boards which are arranged according to the decimal system.
The colours recall the red family of the set of Cuisenaire rods and help to make the four rules of the machine easily accessible.
支援平台：iPhone, iPad