practisable

— And, foraſmuch, as, Addition, Subſtraction, Multiplication, Diuiſion and Extraction of Rotes, are the chief, and ſufficient partes of Arithmetike: which is, the Science that demonſtrateth the properties, of Numbers, and all operatiõs, in numbers to be performed: How often, therfore, theſe fiue ſundry ſortes of Operations, do, for the moſt part, of their execution, differre from the fiue operations of like generall property and name, in our Whole numbers practiſable, So often, (for a more diſtinct doctrine) we, vulgarly account and name it, an other kynde of Arithmetike.