Ответ:
81 : 9 = 9; 9 × 9 = 81.
56 : 7 = 8; 8 × 7 = 56.
54 : 6 = 9; 9 × 6 = 54.
36 : 4 = 9; 9 × 4 = 36.
28 : 7 = 4; 4 × 7 = 28.
21 : 3 = 7; 7 × 3 = 21.
18 : 6 = 3; 3 × 6 = 18.
45 : 9 = 5; 5 × 9 = 45.
81 : 9 = 9; 9 × 9 = 81.
56 : 7 = 8; 8 × 7 = 56.
54 : 6 = 9; 9 × 6 = 54.
36 : 4 = 9; 9 × 4 = 36.
28 : 7 = 4; 4 × 7 = 28.
21 : 3 = 7; 7 × 3 = 21.
18 : 6 = 3; 3 × 6 = 18.
45 : 9 = 5; 5 × 9 = 45.