Решим примеры по действиям:

1. (904 – 66 × 5) : 7
   1. 66 × 5 = 330
   2. 904 – 330 = 574
   3. 574 : 7 = 82
2. (400 – 352 : 4) – 3 × 56
   1. 352 : 4 = 88
   2. 400 – 88 = 312
   3. 3 × 56 = 168
   4. 312 – 168 = 144
3. (203 × 4 + 188) : 100
   1. 203 × 4 = 812
   2. 812 + 188 = 1000
   3. 1000 : 100 = 10
4. (107 × 7 + 151) : 10
   1. 107 × 7 = 749
   2. 749 + 151 = 900
   3. 900 : 10 = 90

Ответы:

• 82
• 144
• 10
• 90