Figure showing method for multiplying 1223 (left)
Figure showing method for multiplying 1223 (left) by using 20 counters on lined reckoning board. From Raymond Lull Practica Compendiosa Artis, 1523
Picture No
13915111
Media ID
48360853
Size
3822px x 5487px
(4.8MB)
Credit
World History Archive / Mary Evans Picture Library
Source
World History Archive
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1223 1523 Arithmetic Artis Calculation Compendiosa Counters Lull Method Multiplying Practica Reckoning Sums
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