NIVEAU 5 (CE1 - CE2)

Combinaison : [1,5,7,9] = 21

Calcul 1 Calcul 2 Calcul Final
1 * 5 = 5 7 + 9 = 16 5 + 16 = 21
1 * 7 = 7 5 + 9 = 14 7 + 14 = 21
1 * 9 = 9 5 + 7 = 12 9 + 12 = 21