¶ Articulum vero reliquis inscribe figuris;
¶ Vel per se scribas, si nulla figura sequatur.
If it is an article, ¶ Here is þe secunde case, þe quych is þis yf þere come an articulle of þe duplacioɳ of a figure þou schalt do ryȝt as þou diddyst in addicioɳ, þat is to [wete] þat þou schalt do away þe figure þat is doublet & put a cipher in the place, and ‘carry’ the tens. sett þere a cifer, & write þe articulle ouer þe next figuris hede, yf þere be any after-warde toward þe lyft side as þus. 25. begyn at the lyft side, and doubulle 2. þat wel be 4. do away þat 2 & sett þere 4. þan doubul 5. þat wel be 10. do away 5, & sett þere a 0, & sett 1 vpon þe next figuris hede þe quych is 4. & þen draw downe 1 to 4 & þat wolle be 5, & þen do away þat 4 & þat 1, & sett þere 5. for þat 1 schal be rekened in þe drawynge togedre for 1. wen leaf 147 b. *þou hast ydon þou schalt haue þis nombre 50. If there is no figure to ‘carry’ them to, write them down. yf þere come no figure after þe figure þat is addit, of þe quych addicioɳ comes an articulle, þou schalt do away þe figure þat is dowblet & sett þere a 0. & write þe articul next by in þe same rewe toward þe lyft syde as þus, 523. double 5 þat woll be ten. do away þe figure 5 & set þere a cifer, & sett þe articul next after in þe same rewe toward þe lyft side, & þou schalt haue þis nombre 1023. þen go forth & double þe oþer nombers þe quych is [lyȝt] [y-nowȝt] to do. versus.
¶ Compositus si sit, in limite scribe sequente
Articulum, primo digitum; quia sic iubet ordo:
Et sic de reliquis faciens, si sint tibi plures.
If it is a Composite, ¶ Here he puttes þe Thryd case, þe quych is þis, yf of duplacioɳ of a figure come a Composit. þou schalt do away þe figure þat is doublet & set þere a digit of þe Composit, write down the digit, and ‘carry’ the tens. & sett þe articulle ouer þe next figures hede, & after draw hym downe with þe figure ouer whos hede he stondes, & make þere-of an nombre as þou hast done afore, & yf þere come no figure after þat digit þat þou hast [y-write], þan set þe articulle next after hym in þe same rewe as þus, 67: double 6 þat wel be 12, do away 6 & write þere þe digit leaf 148 a. *of 12, þe quych is 2, Here is an example. and set þe articulle next after toward þe lyft side in þe same rewe, for þere comes no figure after. þan dowble þat oþer figure, þe quych is 7, þat wel be 14. the quych is a Composit. þen do away 7 þat þou doublet & sett þe þe diget of hym, the quych is 4, sett þe articulle ouer þe next figures hed, þe quych is 2, & þen draw to hym þat on, & make on nombre þe quych schalle be 3. And þen yf þou haue wel y-do þou schalle haue þis nombre of þe duplacioɳ, 134. versus.
¶ Si super extremam nota sit monadem dat eidem
Quod tibi contingat si primo dimidiabis.
How to double the mark for one-half. ¶ Here he says, yf ouer þe fyrst figure in þe ryȝt side be such a merke as is here made, [w], þou schalle fyrst doubulle þe figure, the quych stondes vnder þat merke, & þen þou schalt doubul þat merke þe quych stondes for [haluendel] on. for too [haluedels] makes on, & so þat wol be on. cast þat on to þat duplacioɳ of þe figure ouer whos hed stode þat merke, & write it in þe same place þere þat þe figure þe quych was doublet stode, as þus 23w. double 3, þat wol be 6; doubul þat halue on, & þat wol be on. cast on to 6, þat wel be 7. do away 6 & þat 1, & sett þere 7. þan hase þou do. as for þat figure, þan go leaf 148 b. *to þe oþer figure & worch forth. This can only stand over the first figure. & þou schall neuer haue such a merk but ouer þe hed of þe furst figure in þe ryght side. And ȝet it schal not happe but yf it were y-halued a-fore, þus þou schalt vnderstonde þe verse. ¶ Si super extremam &c. Et nota, talis figura w significans medietatem, unitatis veniat, i.e. contingat uel fiat super extremam, i.e. super primam figuram in extremo sic versus dextram ars dat: i.e. reddit monadem. i.e. vnitatem eidem. i.e. eidem note & declinatur hec monos, dis, di, dem, &c. ¶ Quod ergo totum hoc dabis monadem note continget. i.e. eveniet tibi si dimidiasti, i.e. accipisti uel subtulisti medietatem alicuius unius, in cuius principio sint figura numerum denotans imparem primo i.e. principiis.