Abacus Challenge app for iPhone and iPad
4.6 (
6096 ratings )
Education
Developer: Mark Jensen
0.99 USD
Current version: 1.1, last update: 1 year agoFirst release : 14 Feb 2023
App size: 3.54 Mb
Soroban 4+1 style abacus app that randomly generates numbers to add or subtract and will signal when you have the correct answer. Back and forwards buttons allow you to see if you have made a mistake! Works in portrait or landscape. Work at your own pace, or against the clock! 日本語対応。 支持中文。