abacus代號查詢網站相關資料
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abacus代號查詢網站相關資料
Digital Abacus
Indian Abacus Mental Arithmetic Education for Brain skills:The Abacus over the last 2000 years had evolved to the modern but still a manual version po …
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Napier's abacus
This abacus was created by John Napier of Merchiston in 1617 for calculation of products and quotients of numbers. The method was based on Arab mathem …
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Know Abacus
Abacus is a wonderful mathematical instrument used for calculation. This app will help your children learn about Abacus, Numbers, Counting, Addition, …
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Abacus Calculator
Added abacus ability to the Abacus Display Calculator.免費玩Abacus Calculator APP玩免費免費玩Abacus Calculator AppAbacus Calculator APP LOGOAbacus Calculator A …
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Abacus Supreme
Learn the Abacus and expand your brain power!The Soroban Abacus is a calculating tool in use for over 4,000 years. Abaci are often constructed as a ba …
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Abacus Clock
See time in a completely original way! This digital Android clock tells time through the oldiest mathematical medium know to man--the abacus. Includes …
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