AbacusPro|教育線上App不用買

AbacusPro is the ultimate retro calculator for the iPad!  This is the best selection of abacuses available in one iPad app. AbacusPro is a great addition to your collection of educational, utility or novelty apps. Visit my website to see a video presentation.Four different abacuses are included-* the modern Japanese soroban* the traditional Chinese suanpan* the next generation Chinese suanpan* the rare and distinctive Lee Kai-chen ‘Improved’ abacusThe soroban is my flagship abacus with visual features to aid the novice or casual user. Choose between a 15 digit numeric display or individual number boxes. Set the desired decimal point location for calculations requiring decimal math. Great for classroom instructional use.The Lee Kai-chen abacus is made up of two 9 rod sorobans above a 13 rod suanpan. The suanpan includes a moveable vernier with decimal point and ‘thousands’ commas. A proficient user can do complex calculations with this amazing device.AbacusPro includes optional numeric displays and reset buttons for clearing the beads to zero. A short swipe at the reckoning bar will also clear the beads.While AbacusPro will not instruct in the use of this timeless calculator, it is an invaluable instructional tool. I provide several web and YouTube links of interest. With practice you can become proficient at math and mental calculations.Make great use of this ancient wonder on your high tech device.

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