Ответ: 2.5; 10000; 8.1; 150
Краткое пояснение: Решаем примеры, соблюдая порядок действий.
- 200 ⋅ (75 + 25) : 100 : 20 = 200 ⋅ 100 : 100 : 20 = 20000 : 100 : 20 = 200 : 20 = 2.5
- 4 000 : (1 000 : 500) ⋅ 5 = 4 000 : 2 ⋅ 5 = 2000 ⋅ 5 = 10000
- 30 ⋅ 30 : 100 ⋅ 9 = 900 : 100 ⋅ 9 = 9 ⋅ 9 = 8.1
- 650 – 50 ⋅ 2 ⋅ 5 = 650 – 100 ⋅ 5 = 650 – 500 = 150
Ответ: 2.5; 10000; 8.1; 150