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Mariya 🎭
@mariyamay
Around 2300 to 2700 years before Christ, the first abacus was used by the Sumerians. According to the old belief of Babylonian scientists, like "Carruccio" the abacus was used for addition and subtraction operations and complex calculations.
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Sara 🎭
@saragoegi
Working with abacus is also very good for strengthening the brain and memory 🎭
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