¶ This is þe Chapt{er} of subtraccioɳ, in the quych þou most know foure nessessary thyng{es}. the first what is subtraccioɳ. þe secunde is how mony nombers þou most haue to subt{ra}ccioɳ, the thryd is how mony maners of cases þ{ere} may happe in þis craft of subtraccioɳ. The fourte is qwat is þe p{ro}fet of þis craft. ¶ As for þe first, þ{o}u most know þ{a}t subtraccioɳ is drawyng{e} of on{e} nowmb{er} oute of anoþ{er} nomber. As for þe secunde, þou most knowe þ{a}t þou most haue two rewes of figuris on{e} vnd{er} anoþ{er}, as þ{o}u addyst in addicioɳ. As for þe thryd, þ{o}u moyst know þ{a}t four{e} man{er} of diu{er}se casis mai happe in þis craft. ¶ As for þe fourt, þou most know þ{a}t þe p{ro}fet of þis craft is whenne þ{o}u hasse taken þe lasse nomber out of þe mor{e} to telle what þ{ere} leues ou{er} þ{a}t. & þ{o}u most be-gynne to wyrch in þ{is} craft in þe ryght side of þe boke, as þ{o}u diddyst in addicioɳ. V{er}sus. ¶ Maiori nu{mer}o num{er}u{m} suppone minorem, ¶ Siue pari nu{mer}o supponat{ur} num{er}us par. [Sidenote: Put the greater number above the less.] [*leaf 143a] ¶ Her{e} he telles þat þe hier nomber most be mor{e} þen þe neþ{er}, or els eueɳ as mych. but he may not be lasse. And þe case is þis, þou schalt drawe þe neþ{er} nomber out of þe hyer, & þou mayst not do þ{a}t yf þe hier nomber wer{e} lasse þan þat. ffor þ{o}u mayst not draw sex out of 2. But þ{o}u mast draw 2 out of sex. And þou maiste draw twene out of twene, for þou schal leue noȝt of þe hier twene vn{de} v{er}sus. [Headnote: The Cases of the Craft of Subtraction.] ¶ Postea si possis a prima subt{ra}he p{ri}ma{m} Scribens quod remanet. [Sidenote: The first case of subtraction. Here is an example.] Her{e} is þe first case put of subtraccioɳ, & he says þou schalt begynne in þe ryght side, & draw þe first fig{ure} of þe neþ{er} rewe out of þe first fig{ure} of þe hier rewe. qwether þe hier fig{ur}e be mor{e} þen þe neþ{er}, or eueɳ as mych. And þat is notified in þe vers when he says “Si possis.” Whan þ{o}u has þus ydo, do away þe hiest fig{ur}e & sett þ{ere} þat leues of þe subtraccioɳ, lo an Ensampull{e} +-----+ | 234 | | 122 | +-----+ draw 2 out of 4. þan leues 2. do away 4 & write þ{ere} 2, & latte þe neþ{er} figur{e} sto{n}de stille, & so go for-by oþ{er} figuris till þ{o}u come to þe ende, þan hast þ{o}u do. ¶ Cifram si nil remanebit. [Sidenote: Put a cipher if nothing remains. Here is an example.] ¶ Her{e} he putt{es} þe secunde case, & hit is þis. yf it happe þ{a}t qwen þ{o}u hast draw on neþ{er} fig{ure} out of a hier, & þ{er}e leue noȝt aft{er} þe subt{ra}ccioɳ, þus [*leaf 143b] þou schalt do. þ{o}u schall{e} do away þe hier fig{ur}e & write þ{ere} a cifer, as lo an Ensampull +----+ | 24 | | 24 | +----+