Ge-rímcræft

According to the Old English Dictionary:

es;

ge-rímcræft

m. Arithmetic, art of numbering :-- Ðe sélost cunnon on gerímcræfte that are best acquainted with arithmetic, Bd. de nat. rerum; Wrt. popl. science 11, 1; Lchdm. iii. 256, 7: Hexam. 4: Norm. 8, 5. ge-rimcræft