Algorithms; Arithmetic -- Early works to 1900; Mathematics -- History
þen take and ant{er}y þi neþ{er} figures. And sett þe fyrst fig{ur}e of
þe neþ{er} figures[{11}] vndre be figur{e} of 6. ¶ And draw al þe oþ{er}
figures of þe same rewe to hym-warde, [*leaf 157b] as þ{o}u diddyst
afore. þen m{u}ltiplye 6 be 2, & sett þat þe quych comes ou{er}
þ{ere}-of ou{er} al þe oþ{er} figures hedes þat stondes ou{er} þat 2.
þen m{u}ltiply 6 be 3, & sett all{e} þat comes þ{ere}-of vpon all{e} þe
figur{e}s hedes þat standes ou{er} þat 3; þa{n} m{u}ltiplye 6 be 2, þe
quych stondes vnd{er} þat 6, þen do away 6 & write þ{ere} þe digitt of
þe composit þat schal come þ{ere}of, & sette þe articull ou{er} all{e}
þe figures þat stondes ou{er} þe hede of þat 3 as her{e},
+------+
| 11 |
| 121 |
| 828 |
|464825|
| 232 |
+------+
þen ant{er}y þi figures as þou diddyst afor{e}, and m{u}ltipli 5 be 2,
þat wol be 10; sett þe 0 ou{er} all þe figures þ{a}t stonden ou{er} þat
2, & sett þ{a}t 1. ou{er} the next figures hedes, all{e} on hye towarde
þe lyft side. þen m{u}ltiplye 5 be 3. þat wol be 15, write 5 ou{er} þe
figures hedes þat stonden ou{er} þ{a}t 3, & sett þat 1 ou{er} þe next
figur{e}s hedes toward þe lyft side. þen m{u}ltiplye 5 be 2, þat wol be
10. do away þat 5 & sett þ{ere} a 0, & sett þat 1 ou{er} þe figures
hedes þat stonden ou{er} 3. And þen þou schalt haue such a nounbre as
here stondes aftur.[*leaf 158a]
+------+
| 11 |
| 1101 |
| 1215 |
| 82820|
|4648 |
| 232|
+------+
¶ Now draw all{e} þese figures downe toged{er} as þus, 6.8.1. & 1 draw
to-gedur; þat wolle be 16, do away all{e} þese figures saue 6. lat hym
stonde, for þow þ{o}u take hym away þou most write þer þe same aȝene.
þ{ere}for{e} late hym stonde, & sett 1 ou{er} þe figur{e} hede of 4
toward þe lyft side; þen draw on to 4, þat woll{e} be 5. do away þat 4 &
þat 1, & sette þ{ere} 5. þen draw 4221 & 1 toged{ur}, þat wol be 10. do
away all{e} þat, & write þere þat 4 & þat 0, & sett þat 1 ou{er} þe next
figur{es} hede toward þe lyft side, þe quych is 6. þen draw þat 6 & þat
1 togedur, & þat wolle be 7; do away 6 & sett þ{ere} 7, þen draw 8810 &
1, & þat wel be 18; do away all{e} þe figures þ{a}t stondes ou{er} þe
hede of þat 8, & lette 8 stonde stil, & write þat 1 ou{er} þe next
fig{u}r{is} hede, þe quych is a 0. þen do away þat 0, & sett þ{ere} 1,
þe quych stondes ou{er} þe 0. hede. þen draw 2, 5, & 1 toged{ur}, þat
woll{e} be 8. þen do away all{e} þat, & write þ{ere} 8. ¶ And þen þou
schalt haue þis nounbre, 571880.
[Headnote: The Cases of this Craft.]
[*leaf 158b]
¶ S{ed} cu{m} m{u}ltiplicabis, p{ri}mo sic e{st} op{er}andu{m},
Si dabit articulu{m} tibi m{u}ltiplicacio solu{m};
P{ro}posita cifra su{m}ma{m} t{ra}nsferre meme{n}to.
[Sidenote: What to do if the first multiplication results in an
article.]
¶ Her{e} he puttes þe fyrst case of þis craft, þe quych is þis: yf
þ{ere} come an articulle of þe m{u}ltiplicacioɳ ysette befor{e} the
articull{e} in þe lyft side as þus
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