The schoolmasters assistant: being a compendium of arithmetic, both practical and theoretical [electronic resource] : In four parts. Containing, I. Arithmetic in Whole Numbers, wherein all the common Rules, having each of them a sufficient Number of Questions, with their Answers, are methodically and briefly handled. II. Vulgar Fractions, wherein several Things, not commonly met with, are there distinctly treated of, and laid down in the most plain and easy Manner. III. Decimals, in which, among other Things, are considered the Extraction of Roots; Interest, both Simple and Compound; Annuities; Rebate, and Equation of Payments. IV. A large Collection of Questions, with their Answers, serving to exercise the foregoing Rules; together with a few others, both pleasant and diverting. The Whole, Being delivered in the most familiar Way of Question and Answer, is recommended by several eminent Mathematicians, Accomptants and Schoolmasters, as necessary to be used in Schools by all Teachers, who would have their Scholars, thoroughly understand, and make a quick Progress in Arithmetic. To which is prefixt, an essay on the education of youth, humbly offer'd to the Consideration of Parents. The second edition. By Thomas Dilworth, Author of the New Guide to the English Tongue; and Schoolmaster in Wappin.