Filo misses his grandfather, and along with his sister, they design a complex math formula to countdown the days until their grandfather's return. Filo is enthralled with all his grandfather's new teachings and becomes absorbed in everything that has to do with math.
Molto scorrevole e molto molto carino!!! Tratta temi importanti con l'utilizzo di termini appropriati, semplifica i concetti lasciando intatta la natura matematica dei contenuti