by Joan Olivares · Algar · tapa blanda · ISBN 9788498458275
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«Tu abuela es una crack de las mates» is a children's book by Joan Olivares, published by Algar in paperback (88 pages, in Spanish).
Ismael avoids mathematics until he meets Elvira. Over snacks, grandmother Balbina tells them stories that make natural numbers, multiplication tables, division, fractions and percentages understandable. The book includes the experiment «La magia del 9».
It is volume 10 of the El Club de la Ciencia collection and features illustrations by Javier Lacasta Llácer.
Recommended for 5th grade of Primary and for children who want to approach mathematics in a playful way.
