Arithmetic fairly laid open [electronic resource] : or, the trader's sure guide. Containing all those rules of arithmetic which commonly go under that title, performed both by whole numbers and decimals, in a more plain and comprehensive Manner than any Piece of the Kind yet extant. To which are added, The Extractions of the Square and Cube Roots; Arithmetical and Geometrical Progression; a small Treatise of Mensuration; and a greater Variety of Compendiums for casting up all Sorts Merchandise, than are to be met with in any other Piece whatever. The second edition, with additions. By John Gore, Accomptant, in Manchester.