by Ramón Rubio Silvestre, Enrique Rubio Polo · Editorial Rubio · tapa blanda · ISBN 9788489773226
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«Problemes Rubio 17» is the math problem workbook by Ramón Rubio Silvestre and Enrique Rubio Polo, from Editorial Rubio, in paperback and in Catalan.
The workbook presents problems involving addition, subtraction, multiplication and division by several digits to develop mathematical reasoning. One example asks how long a cyclist traveling at 31 km/h will take to cover 186 kilometers. It includes exercises to practice and consolidate calculation.
Number 17 in the «Operacions i Problemes RUBIO (català)» series. A5-format workbook, 20 pages, published in 2010, for children aged 10 to 11.
School reinforcement material intended for students in 5th grade of elementary school, approximately 10 to 11 years old.
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