Решим примеры по порядку:
7 ⋅ 3 – 7 = 21 – 7 = 14
3 ⋅ 5 + 3 = 15 + 3 = 18
2 ⋅ 7 – 5 = 14 – 5 = 9
37 + 6 + 14 = 43 + 14 = 57
5 + 25 + 18 = 30 + 18 = 48
48 + 7 + 13 = 55 + 13 = 68
2 ⋅ 8 = 16
2 ⋅ 9 = 18
9 ⋅ 2 = 18
15 : 5 = 3
18 : 9 = 2
21 : 7 = 3