by Andrea Pastor Fernández, Francisco Ruiz Casado, Dionisio Escobar Pastor, Esther Mayoral Pastor · Grupo Anaya Publicaciones Generales · tapa blanda · ISBN 9788466715492
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«Problemas 15: Sumar, Restar, Multiplicar, Dividir» is the math exercise book by Andrea Pastor Fernández and others, from Anaya, in paperback.
This volume brings together problems involving addition, subtraction, multiplication and division to practice calculation and problem-solving. The content progresses gradually, and here the four basic operations are combined.
Published in 2003 in Spanish, with 24 pages. It is number 15 in the Problemas collection, made up of twenty volumes.
Aimed at students in the third cycle of elementary school, it serves as math reinforcement both in the classroom and at home.
