I - Calcul - 3: Fractions - b: Addition/Soustraction [env 11′] https://sesamath.ch/post-obligatoire/matugym/manuel-matugym-1e/complements/ch01/videos/I-3/I-3-b https://sesamath.ch/@@site-logo/logo_2021.png I - Calcul - 3: Fractions - b: Addition/Soustraction [env 11′]
