Thomas Masterson his addition to his first booke of arithmetick : Shewing the true vnderstanding of the same booke: with the examples therein, declared at large: also how the solutions of the questions propounded in his second booke of arithmeticke, may be calculated by the said first booke many seuerall wayes. All after so plaine and easie manner, that any which is desirous to make the said operations, may hereby vnderstand and learne to worke them, without the helpe of any other teacher.