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# Title: [Johannis Wallis S. T. D. Geometriae Professoris Saviliani, in Celeberrima Academia Oxoniensi; Opera Mathematica] Johannis Wallis S. T. D. Geometriæ Professoris Saviliani, in Celeberrima Academia Oxoniensi; Opera Mathematica (shelfmarks Leibn. Marg. 100:1/2, Stück 1; Leibn. Marg. 100:1/2)
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ER ACTFONUM
aD. XT IV
empe Fractionis Mulcipticandae, Numerator in MumeratOret,  CCHOMMHAIOL
in Benominatorem Mulciplicantis ducatur; tractionis aurem Diridenda, Nume-
racor in diridentis Denominatorem, ee Denominator in Numeratorem. (Ouod
C Breriter enunciat Ougheredus, Mulsiplicatio comparat heterolosos terminos, e
multiplicat Bomolocos: Divisio comparat homoboees, e multiplicat Beteroloeos.)
Sic E Fractio , in 53 ducenda Lit: Reducta prius , 8 ad 3; comparo adhuc 2 nu-
meratorem prioris, ec 32 denominatorem polterioris, proque iIlis lubltituo rdt 16:
cum etiam PrO O denOIatOTC PEIOTIS, _ 25 . P 
3e5. Ldeoque randem  18.
Similiter, s dividenda Fractio 18 = 3, Per 2 55 = 33: operatio sic procedet.
Operatio-
num in
fractis hac Sgnopli conspiciendum Labstetmus.
Synopsisi
Totum icaque cum Acdicionis e Subductionis, cum Mulciplicationis et Divisio.
numeris nis negocium, in numeris Practis; duobus his capicibus absolrimus. Quod breri
Adao a Subduetio.
eB = ab
Mulciplicatio.
Dirito.
a A P. ZL IV.
De Fractionum Reductionibus variis. Impropriae fractio.
nis ad numerum interrum vel mistum reductio: e
contra. Reductio ad minimos terminos: Ad commu-
nem Denominatorem: Ad Denominatorem datum:
Ad communem datumve Numeratorem. De fractio.
num fractionibus reducendis. De fractionibus Sevare-
nariis  Decimalibus, tum ad invicem, tum ad fra-
ctiones ordinarias reducendis.
om eadem quoad ralorem tractio, mille modis delisnari pollic, uti luverine
cradicum elb: F.  pedir nonnunguam ex una in aliam torman tractiones crans.
MUtare;
de l
Dei
eom