Выполняю решение примеров.
90 + (2 × 9 – 8) + 9 ∶ 1
- 2 × 9 = 18
- 18 – 8 = 10
- 9 ∶ 1 = 9
- 90 + 10 + 9 = 109
Ответ: 109
170 – (41 + 19 – 15) ∶ 3
- 41 + 19 = 60
- 60 – 15 = 45
- 45 ∶ 3 = 15
- 170 – 15 = 155
Ответ: 155
(108 – 107) × (81 ∶ 9 + 32 ∶ 4)
- 108 – 107 = 1
- 81 ∶ 9 = 9
- 32 ∶ 4 = 8
- 9 + 8 = 17
- 1 × 17 = 17
Ответ: 17
(8 × 5 + 3 × 6) ∶ (30 – 29)
- 8 × 5 = 40
- 3 × 6 = 18
- 40 + 18 = 58
- 30 – 29 = 1
- 58 ∶ 1 = 58
Ответ: 58
(108 – 72) ∶ (20 – 14) + 28
- 108 – 72 = 36
- 20 – 14 = 6
- 36 ∶ 6 = 6
- 6 + 28 = 34
Ответ: 34
(8 × 4 – 15) ∶ (13 – 6) + 5
- 8 × 4 = 32
- 32 – 15 = 17
- 13 – 6 = 7
- 17 ∶ 7 = 2,43
- 2,43 + 5 = 7,43
Ответ: 7,43
48 ∶ (2 + 6) + 7 × (5 – 1)
- 2 + 6 = 8
- 5 – 1 = 4
- 48 ∶ 8 = 6
- 7 × 4 = 28
- 6 + 28 = 34
Ответ: 34
(9 × 5 – 15) ∶ 3 + 8 × (4 – 2)
- 9 × 5 = 45
- 45 – 15 = 30
- 4 – 2 = 2
- 30 ∶ 3 = 10
- 8 × 2 = 16
- 10 + 16 = 26
Ответ: 26
(7 × 9 – 33) + (28 ∶ 4 – 2)
- 7 × 9 = 63
- 63 – 33 = 30
- 28 ∶ 4 = 7
- 7 – 2 = 5
- 30 + 5 = 35
Ответ: 35
(72 – 45) ∶ (14 – 5) + (6 × 3)
- 72 – 45 = 27
- 14 – 5 = 9
- 6 × 3 = 18
- 27 ∶ 9 = 3
- 3 + 18 = 21
Ответ: 21