En ce début d'année , manipulation still has a very important place for our mathematics sessions.
Premier travail sur la décomposition des nombres à l'aide de cubes de couleurs :" I now know that 5 c'est
– 5 and even 0 but also 0 and even 5
-4 and even 1 but also 1 and even 4
-3 and even 2 but also 2 and even 3
