Algoriſmus nouus¶ Figura Reductōis Additionis ⁊ Subtractōis.Numera ores17AddeTubtrahe Et fit nūerator 1Ol̓riplicaMultiplicaEt ſit denoīator ſem12DenominatoresUltiplicatō in minutijs. ml̓tiplicet̉ nūerator vniuain numeratorem alterius ⁊ producetur numerator.Deinde multiplicetur denoīator vnius in denominatorem alterius ⁊ producetur denominator tocius multi-plicationis vt volo multiplicare que 2 perꝫ facit 6valent medietatem vt patet in figurai2zFigura multiplicationis.6Multiplica.1AMultiplica-