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1 St. 48 Min, 1 Jan 500 Jahr v. Chr. - Abacus- a counting frame used by many countries before the Hindu and Arabic numeral system. Used For addition, subtraction and simple equations

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skurka class

20 Okt 2017

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1 St. 48 Min, 1 Jan 500 Jahr v. Chr.

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~ 2527 years ago

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