69
De137 cantare vendito pro libris et denariis
Item cantare valet libras 13 et denarios 7, hoc est libras \({\phantom{1}7~~\phantom{1}0 \over 12~~20}\) 13; quantum valent
138 
|
|
|
⑤ £ |
℞ |
|
3127 |
|
|
\({\phantom{1}7~~\phantom{1}0 \over 12~~20}\) 13 |
100 |
|
pensa per 7 |
① |
|
⑤ £ |
|
|
\({\phantom{1}1~~\phantom{1}6~~\phantom{1}1~~16 \over 10~~10~~12~~20}\) 96 |
743 |
|
|
139 ergo cantaria 7 et rotuli 43, hoc est rotuli 743? Describe questionem, et multiplica 13 per 20 que per 12 et adde 7; erunt 3127, que multiplica per 743; erunt 2323361, que divide per 100 et per \({\phantom{1}1~~\phantom{1}0 \over 12~~20}\), hoc est per \({\phantom{1}1~~\phantom{1}0~~\phantom{1}0~~\phantom{1}0 \over 10~~10~~12~~20}\): exibunt \({\phantom{1}1~~\phantom{1}6~~\phantom{1}1~~16 \over 10~~10~~12~~20}\) 96 pro pretio illorum rotulorum 743.
