The first printed mathematical book translated into Modern Armenian Arhest Hamaroghoutean -Art of Mathematics. It was published by Soghomon Levonyan (cousin of Voskan Yerevantsi) in 1675 Marseille. The preface and ending of the book are in Classical Armenian, the whole text in Modern Armenian. The book is the translation of the work of German mathematician Christopher Clavius (1537-1612). The book doesn’t contain math definitions and evidences, but the options of practical calculations, which are presented with size and weight units of different countries (Italy, France, Iran). At the time the book was perfectly fitting to practical requirements of Armenian merchants.