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calculatory

adjective
cal·​cu·​la·​to·​ry | \-ləˌtōrē, -ˌȯ-\

Definition of calculatory 

: of or relating to calculation how the Maya carried out their calculatory operations— A. L. Kroeber

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History and Etymology for calculatory

Late Latin calculatorius, from Latin calculatus + -orius -ory

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