價格：免費
檔案大小：48.3 MB
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
Learn about the Roman numerals with a range of activities and step-by-step tutorials.
The Roman numerals or Romans numbers are a number system developed by the ancient Romans. It remained the usual way of writing numbers throughout Europe well into the Late Middle Ages.
支援平台：iPhone, iPad