價格：免費
檔案大小：371.7 MB
版本需求：系統需求：iOS 11.0 或以後版本。相容裝置：iPhone、iPad、iPod touch。
支援語言：英語
Addition and subtraction are core mathematics that people use everyday for basic world operations. Now it can be used to guide rockets into space and accelerate the space race. Try Galactic Addition Subtraction now !
支援平台：iPhone, iPad