The translation you're looking for is: "Calculation by Completion and Balancing" The book's name in English is: "The Compendious Book on Calculation by Comple

The translation you're looking for is: "Calculation by Completion and Balancing" The book's name in English is: "The Compendious Book on Calculation by Completion and Balancing" So Al-jabr meaning is very close to "calculation by Completion" in that context.