NIVEAU 5 (CE1 - CE2)

Combinaison : [2,7,8,9] = 26

Calcul 1 Calcul 2 Calcul Final
2 + 7 = 9 8 + 9 = 17 9 + 17 = 26
2 + 8 = 10 7 + 9 = 16 10 + 16 = 26
2 + 9 = 11 7 + 8 = 15 11 + 15 = 26