Proba impartirii in doua moduri
24 : 8 = 3
3 × 8 = 24 → proba prin inmultire
8 × 3 = 24
24 : 3 = 8 → proba prin impartire
18 : 9 = 2 48 : 8 = 6 27 : 9 = 3 36 : 9 = 4
2 × 9 = 18 6 × 8 = 48 3 × 9 = 27 4 × 9 = 36
9 × 2 = 18 8 × 6 = 48 9 × 3 = 27 9 × 4 = 36
18 : 2 = 9 48 : 6 = 8 27 : 3 = 9 36 : 4 = 9
56 : 8 = 7 64 : 8 = 8 81 : 9 = 9
7 × 8 = 56 8 × 8 = 64 9 × 9 = 81
8 × 7 = 56
56 : 7 = 8