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What is a soroban?

soroban
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What is a soroban?

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The soroban is a Japanese abacus which has been used for many centuries. It is a flat frame which has a bar running through it. The version used by Smart Brain has 17 columns, each with 5 beads on. There are 4 beads below the bar, and one bead above the bar. Click here for an example image.

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