A new system of arithmetic, on the cancelling plan: embracing the rules of three, single and double, direct and inverse; barter; loss and gain; reduction, multiplication and division of fractions; exchange of currencies; interest; and all proportional questions in one rule applicable to the whole. The process greatly simplified and abridged. By Charles G. Burnham, A. M 1837 [LeatherBound]
Charles Guilford Burnham
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