e2fad2d4-a6be-4e8e-a396-aa5ca8af813ccda2a289-1b43-4911-9bf2-24f9d68279d39.6.1.3[{"lang":"es","name":"Estructura algebraica para la suma y el producto de números racionales"},{"lang":"en","name":"Algebraic structure for addition and multiplication of rational numbers"},{"lang":"ca","name":"Estructura algebraica per a la suma i el producte de números racionals"}]67/18/16, 11:43 AM7/18/16, 11:43 AM