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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)
# Folio 67, page id 851387705:0087
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Cap. XIV. DE SUBDUCTEONE.
Rcdlicionis praxis in speciebus (ue lognuntur) sive Crmbolis, se in poceltacibus
Algebricis, interius, polt explicacum Numerorum subductionem, cradetur.
C A P. XIV.
Subductio Sdditioni contraria. Subductio quid: Sub-
ductionis praxis: in Numeris Simplicibus: In numeris
Compositis. Praxeos demonstratio. Pranis in partibus
Decimalibus: in variis Denominationibus. Subductio
majoris ex minore, impossibilis. Duantitates necativae
seu Ablatitice; non ab sur de supponuntur; quid innu-
ant. Sub ductiomajoris ex minore, quatenus supponi-
tur praestanda.
TOA Addicionis craditionem, ad Subductionem seu Subcractionem deveniendum subductio
est; quae addicioni concraria ct: VE enim AadiciO NMMeTUM NICTO, vel Addisio-
Faltem Onancicaum quancitati, adjunsit; Subduetio d CONETA NUICrUm NuMeIO, ni con-
vel Ouancitarem quanciraci, autere: Adleoque quod Addicio componic id Subductio traria.
diltolvu. In praxi Addicionis, dacis parcibus invelligatur Focum; in praxi Sub.
duetionis, Dato Poco cum parre una, quaeritur Reliduum seu pars reliqua.
Fst isicuE Subducere, Numerum a numero, vel potius duaniitatem a quantitate, Subductio
auserendo, Residuum exhihere. Subductionis aucem live Ablationis noca, hac ette quid .
Tolet -. Adeoque li ex s auseramus 3, reltabic 5 - 3. Si ex quancitate A au
feracur quanciras B, manebic A = B. Ellud aucem Arichmeciei practici, in praxi
Tubenctionis, munus elL, ut Reliduum quam tieri pocelt commode nocis exprimat,
ejusq; valorem incellcetui extribeat. Ouod quo pacto tieri postic, nunc cracticuri lumus.
In numerorum subductione, numeri duo dancur, quorum alter ab alcero aute.
rendus elt, de cerrius quaerieur. Numerum illum a quo alter est auterendus. Nu
merum Minuendum appello; auterendum vero Minutorem; tercium autem quem
quaerimus, R siduum voco. Sic li ex numero quinario auterendus (ic cernarius 3:
NumerUS Minuendus CHE 5, MINUTOY 3, qui reltat auTCM 5 = 3 == 2 RCliduns clt.
Vel univerlim ( quonam alins eriam quantitares subducendas elle non raro acci.
dic) diei voltun Guancicas Minuenda, quancicas Minuens, e quantitas Residua,
vel Locum, Ablatum, Residuum
Numerorum simplicium subductionem nemo supponitur ipnorate, sed vel na- Subdu-
tura vel ulu quocidiano didicisse; ut li ex 5 auterancur 3, sectare 2. AucCaltem, ctionis
E illud docere lic necesse; potiris cor punctis quot est numerus
minuendus, puta 5, l tor deleaneur, quoc est numerus minuens
leu anterendus, pura 3, icllase deprchendemus 2. Vet denique
Tabella Radicionis e Subductionis.
numeris
semplici
Pt a 61 5 21
C4  25 I16
2123124125 (26) 17
8(20(T2I12113124125116127118
ex tabella quam supra poluimus, illud depromi porest. Si nempe AILIMIEruS MIUI
ens vel auterendus in summitace sumatur, puta 3, acque interius u Caclem columna
GuXTaTUE