The scholar's guide to arithmetic : being a collection of the most useful rules, viz. notation, addition, subtraction, multiplication, division, reduction, rule of three, practice, interest, barter, loss and gain, tare and trett, fellowship, double rule of three, vulgar fractions, decimal fractions, interest by decimals, extraction of the square & cube root, position, progression, duodecimals, or cross multiplication: : To which is added, a short treatise on mensuration of planes and solids; with a sufficient number of practical questions at the end of each rule. : Designed for the use of schools. / By Phinehas Merrill.