5.3+67 67+3 9+28 9 +26 34- (18-9) Ο 34-8 75- (14-6) Ο 75-7

3 + 67 = 70

67 + 3 = 70

9 + 28 = 37

9 + 26 = 35

34 – (18 – 9) = 34 – 9 = 25

34 – 8 = 26

75 – (14 – 6) = 75 – 8 = 67

75 – 7 = 68

25 < 26, значит, 34- (18-9) < 34-8

67 < 68, значит, 75- (14-6) < 75-7

Ответ: 34- (18-9) < 34-8; 75- (14-6) < 75-7