¶ Her{e} by-gynnes þe craft of Addicioñ. In þis craft þ{o}u most knowe foure thyng{es}. ¶ Fyrst þ{ou} most know what is addicioñ. Next þ{o}u most know how mony rewles of figurys þou most haue. ¶ Next þ{o}u most know how mony diue{r}s casys happes in þis craft of addicioñ. ¶ And next qwat is þe p{ro}fet of þis craft. ¶ As for þe first þou most know þat addicioñ is a castyng to-ged{ur} of twoo nomburys in-to on{e} nombr{e}. As yf I aske qwat is twene & thre. Þ{o}u wyl cast þese twene nomb{re}s to-ged{ur} & say þ{a}t it is fyue. ¶ As for þe secunde þou most know þ{a}t þou schall{e} haue tweyne rewes of figures, on{e} vndur a-nother, as her{e} þ{o}u mayst se. 1234 2168. ¶ As for þe thryd þou most know þ{a}t ther{e} ben foure diu{er}se cases. As for þe forthe þ{o}u most know þ{a}t þe p{ro}fet of þis craft is to telle what is þe hole nomb{ur} þ{a}t comes of diu{er}se nomburis. Now as to þe texte of oure verse, he teches ther{e} how þ{o}u schal worch in þis craft. ¶ He says yf þ{o}u wilt cast on{e} nomb{ur} to anoþ{er} nomb{ur}, þou most by-gynne on þis wyse. ¶ ffyrst write [*leaf 140b] two rewes of figuris & nombris so þat þ{o}u write þe first figur{e} of þe hyer nomb{ur} euen{e} vnd{ir} the first fig{ure} of þe nether nomb{ur}, And þe secunde of þe nether nomb{ur} euen{e} vnd{ir} þe secunde of þe hyer, & so forthe of eu{er}y fig{ur}e of both þe rewes as þ{o}u mayst se. 123 234. [Headnote: The Cases of the Craft of Addition.] ¶ Inde duas adde p{ri}mas hac condic{i}one: Si digitus crescat ex addic{i}one prior{um}; P{ri}mo scribe loco digitu{m}, quicu{n}q{ue} sit ille. [Sidenote: Add the first figures; rub out the top figure; write the result in its place. Here is an example.] ¶ Here he teches what þ{o}u schalt do when þ{o}u hast write too rewes of figuris on vnder an-oþ{er}, as I sayd be-for{e}. ¶ He says þ{o}u schalt take þe first fig{ur}e of þe heyer nomb{re} & þe fyrst figur{e} of þe neþ{er} nombre, & cast hem to-ged{er} vp-on þis condicioɳ. Thou schal loke qweþ{er} þe nombe{r} þat comys þ{ere}-of be a digit or no. ¶ If he be a digit þ{o}u schalt do away þe first fig{ur}e of þe hyer nomb{re}, and write þ{ere} in his stede þat he stode Inne þe digit, þ{a}t comes of þe ylke 2 fig{ur}es, & so wrich forth oɳ oþ{er} figures yf þ{ere} be ony moo, til þ{o}u come to þe ende toward þe lyft side. And lede þe nether fig{ure} stonde still eu{er}-mor{e} til þ{o}u haue ydo. ffor þ{ere}-by þ{o}u schal wyte wheþ{er} þ{o}u hast don{e} wel or no, as I schal tell þe aft{er}ward in þe ende of þis Chapt{er}. ¶ And loke allgate þat þou be-gynne to worch in þis Craft of [*leaf 141a] Addi[*]cioɳ in þe ryȝt side, here is an ensampul of þis case. 1234 2142.