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E. Stefanova

Bulgarian and English Language and Literature teacher

ABC Learing Academy is an education centre with a head office in Plovdiv, Bulgaria. It offers a wide range of training programmes and courses and various additional services.

4000 Plovdiv, 114 "Peshtersko shose" Boulevard
info@abckursove.com
+359 87 7710 222
032 24 00 08

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E. Stefanova

Mental arithmetic and its relation to pedagogy

What is an abacus? The history of abacus calculating device.