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One digit divisor exercises (short division)
Multi digit divisor exercises (long division)
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Newton's method for roots on the soroban
Sir Isaac Newton A non-traditional technique Square, cube and fifth roots can be solved on the abacus using Newton's method. It is not...
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A Scottish scientist writes about soroban Prof. Cargill G. Knott Cargill Gilston Knott (30 June 1856 – 26 October 1922) was a Scottish phy...
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A more efficient use of the abacus Ancient abacuses, both Japanese style (soroban) and Chinese style (suanpan), used to have five beads on t... -
Sir Isaac Newton A non-traditional technique Square, cube and fifth roots can be solved on the abacus using Newton's method. It is not...
