[Headnote: The Mediation of an Odd Number.]
¶ Impar si fu{ er}it vnu{ m} demas mediar{ e} Quod no{ n} p{ re}sumas, s{ ed} quod sup{ er}est mediabis Inde sup{ er} tractu{ m} fac demptu{ m} quod no{ ta}t vnu{ m}.
[Sidenote: If it is odd, halve the even number less than it. Here is an example. Then write the sign for one-half over it. Put the mark only over the first figure.]
Her{ e} is þe secunde case of þis craft, the quych is þis. yf þe first figur{ e} betoken{ e} a nombre þat is odde, the quych odde schal not be mediete, þen þ{ o}u schalt medye þat nombre þat leues, when the odde of þe same nomb{ re} is take away, & write þat þ{ a}t leues as þ{ o}u diddest in þe first case of þis craft. Wha[n~] þ{ o}u hayst write þat. for þ{ a}t þat leues, write such a merke as is her{ e} ^w vpon his hede, þe quych merke schal betoke[n~] halfe of þe odde þat was take away. lo an Ensampull. 245. the first figur{ e} her{ e} is betokenyng{ e} odde nombre, þe quych is 5, for 5 is odde; þ{ er}e-for{ e} do away þat þ{ a}t is odde, þe quych is 1. þen leues 4. þen medye 4 & þen leues 2. do away 4. & sette þ{ ere} 2, & make such a merke ^w upon his hede, þat is to say ou{ er} his hede of 2 as þus. 242.^w And þen worch forth in þe oþ{ er} figures tyll þ{ o}u come to þe ende. by þe furst case as þ{ o}u schalt vnd{ er}stonde þat þ{ o}u schalt [*leaf 150a] neu{ er} make such a merk but ou{ er} þe first fig{ ur}e hed in þe ri[gh]t side. Wheþ{ er} þe other fig{ ur}es þat comy[n~] aft{ er} hym be eue[n~] or odde. v{ er}sus.
[Headnote: The Cases of the Craft of Mediation.]
¶ Si monos, dele; sit t{ ibi} cifra post no{ ta} supra.
[Sidenote: If the first figure is one put a cipher.]
¶ Here is þe thryde case, þe quych yf the first figur{ e} be a figur{ e} of 1. þ{ o}u schalt do away þat 1 & set þ{ ere} a cifer, & a merke ou{ er} þe cifer as þus, 241. do away 1, & sett þ{ ere} a cifer w{ i}t{ h} a merke ou{ er} his hede, & þen hast þ{ o}u ydo for þat 0. as þus 0^w þen worch forth in þe oþer fig{ ur}ys till þ{ o}u come to þe ende, for it is lyght as dyche water. vn{ de} v{ er}sus.
¶ Postea p{ ro}cedas hac condic{ i}one secu{ n}da: Imp{ ar} si fu{ er}it hinc vnu{ m} deme p{ ri}ori, Inscribens quinque, nam denos significabit Monos p{ re}d{ ict}am.
[Sidenote: What to do if any other figure is odd. Write a figure of five over the next lower number's head. Example.]