- 3 + 67 = 70
67 + 3 = 70
3+67 = 67+3
- 9 + 28 = 37
9 + 26 = 35
9+28 > 9+26
- 34 - (18 - 9) = 34 - 9 = 25
34 - 8 = 26
34- (18-9) < 34-8
- 75 - (14 - 6) = 75 - 8 = 67
75 - 7 = 68
75- (14-6) < 75-7
Ответ: 3+67 = 67+3; 9+28 > 9+26; 34- (18-9) < 34-8; 75- (14-6) < 75-7