Getæl-wís

According to the Old English Dictionary:

getæl-wís

adj. Skilled in computation :-- Compos . . . prudens vel getaelwís, Wttlck. Gl. 207, 40. þæs geáres dagas þe getelwíse witan nemniað Solaris annus, Angl. viii. 316, 45. getæl-wis