NIVEAU 4 (CE1 - CE2)

Combinaison : [1,5,7,8] = 21

Calcul 1 Calcul 2 Calcul Final
1 + 5 = 6 7 + 8 = 15 6 + 15 = 21
1 + 7 = 8 5 + 8 = 13 8 + 13 = 21
1 + 8 = 9 5 + 7 = 12 9 + 12 = 21