NIVEAU 5 (CE1 - CE2)

Combinaison : [1,3,7,8] = 12

Calcul 1 Calcul 2 Calcul Final
3 * 7 = 21 1 + 8 = 9 21 - 9 = 12
7 + 8 = 15 1 * 3 = 3 15 - 3 = 12