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The Abacus A Pocket Computer
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An abacus, also called as Counting Frame, is a calculating tool for performing arithmetical processes. It is as fast in some people's hand as a calculator. It is often constructed as wooden frame with beads sliding on. This title contains a book & an Abacus.
An abacus, also called as Counting Frame, is a calculating tool for performing arithmetical processes. It is as fast in some people's hand as a calculator. It is often constructed as wooden frame with beads sliding on. This title contains a book & an Abacus.
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%30İNDİRİM129,00 90,30
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%20İNDİRİM350,00 280,00
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%30İNDİRİM473,00 331,10
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