【實用遊戲app】npiSoroban|最夯免費app

2月 17, 2011

674

The Japanese soroban, otherwise known as an abacus, has been used for centuries in markets around the world. From stones and grooves in the sand, the soroban is now realized on the iPad, complete with how-to-use tutorials. Once you get the hang of it, math has never been so easy!