The school-Master's general assistant: or, a complete system of arithmetic [electronic resource] : In two volumes. ... Containing I. All the Rules of Arithmetic in whole Numbers. II. Vulgar Fractions. III. Finite, Repeting, Circulating and Approximating Decimals. IV. Sexagesimals. V. Extraction of the Square and Cube Roots. VI. A Variety of useful Questions, with their Answers annexed, to exercise each Rule in Order. To which are added, LXXX Curious Questions to exercise all the Rules promiscuously. ... Containing, I. One Hundred Curious Discoveries in Arithmetic, by which all the Rules are performed in a short and elegant Manner, the Solutions being generally given in half the Time, and work requisite by Common Rules. II. Easy Rules for calculating in mind the most useful Cases in Trade, and that more expeditiously than the best Accomptants can with Pen and Ink by the Common Rules. The Whole delivered in a plain and easy Manner, for the conveniency both of Master and scho[l]ar By Jacob Welsh, Master of the Academy in Silver-Street, Golden-Square.