Practical arithmetic: or, The rule of practice methodized and improved. [electronic resource] : Wherein are contained all the necessary cases, and several examples wrought under each case, with many contractions. And examples annexed to exercise the learner; which serves as a question-book. To which are added, the most concise methods of finding the value of goods sold by particular quantities. The whole adapted to the use of merchants, and wholesale and retail dealers, in every branch of business. Also duodecimals by practice, applied to work performed by glaziers, painters, paviors, and joiners. And to measuring by the square of 100 feet, applied to flooring, tyling, and partitioning. Likewise measuring of round, squared and unequal squared timber. Designed for the use of schools, as well as private gentlemen. By John Dean, accomptant.