Algorithms; Arithmetic -- Early works to 1900; Mathematics -- History
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[*129b] And then seke I how often the diuisor wyll be taken from the
nomber agaynste it, whiche wyll be 4 tymes and 1 remaynynge.
_S._ But what yf it chaunce that when the diuisor is so remoued, it can
not be ones taken out of the diuident agaynste it?
_M._ Then must the diuisor be set in an other line lower.
_S._ So was it in diuision by the penne, and therfore was there a cypher
set in the quotient: but howe shall that be noted here?
_M._ Here nedeth no token, for the lynes do represente the places: onely
loke that you set your quotient in that place which standeth for vnities
in respecte of the diuisor: but now to returne to the example, I fynde
the diuisor 4 tymes in the diuidente, and 1 remaynynge, for 4 tymes 2
make 8, which I take from 9, and there resteth 1, as this figure
sheweth:
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and in the myddle space for the quotient I set 4 in the seconde lyne,
whiche is in this worke the place of vnities.[*130a] Then remoue I y^e
diuisor to the next lower line, and seke how often I may haue it in the
dyuident, which I may do here 8 tymes iust, and nothynge remayne, as in
this fourme,
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where you may se that the hole quotient is 348 d’, that is 29 s. wherby
I knowe that so moche coste the purchace of one aker.
_S._ Now resteth the profes of Multiplycatio{n}, and also of Diuisio{n}.
_M._ Ther best profes are eche [*130b] one by the other, for
Multyplication is proued by Diuision, and Diuision by Multiplycation,
as in the worke by the penne you learned.
_S._ Yf that be all, you shall not nede to repete agayne that, y^t was
sufficye{n}tly taughte all redye: and excepte you wyll teache me any
other feate, here maye you make an ende of this arte I suppose.
Public-domain text, read in full here on John Shaqi.
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