A Key To The Western Calculator : Contai

Containing the Solution of All the Examples and Questions for Exercise, Whith Reference to the Pages Where They Stand, to Which Is Added, Some Useful Rules, Des... » 

Containing the Solution of All the Examples and Questions for Exercise, Whith Reference to the Pages Where They Stand, to Which Is Added, Some Useful Rules, Designed Chiefly to Facilitate the Labour of Teachers; And Assi «