2 × 5 + 4 = 10 + 4 = 14
(4 + 5) × 2 = 9 × 2 = 18
14 < 18
2 × 5 + 4 < (4 + 5) × 2
Ответ: 2·5+4 < (4+5)·2
9 × 2 = 18
(6 + 3) × 2 = 9 × 2 = 18
18 = 18
9 × 2 = (6 + 3) × 2
Ответ: 9·2 = (6+3)·2
6 × 3 + 4 × 3 = 18 + 12 = 30
(6 + 4) × 3 = 10 × 3 = 30
30 = 30
6 × 3 + 4 × 3 = (6 + 4) × 3
Ответ: 6·3+4·3 = (6+4)·3
7 × 4 + 4 × 4 = 28 + 16 = 44
(7 + 4) × 4 = 11 × 4 = 44
44 = 44
7 × 4 + 4 × 4 = (7 + 4) × 4
Ответ: 7·4+4·4 = (7+4)·4