Ответ:

  1. \(72 : 8 + 25 = 9 + 25 = 34\);
  2. \(100 - 56 : 8 = 100 - 7 = 93\);
  3. \(32 : 8 \cdot 2 = 4 \cdot 2 = 8\);
  4. \((65 - 25) : 8 = 40 : 8 = 5\);
  5. \(64 : 8 - 6 = 8 - 6 = 2\);
  6. \(51 - 16 : 8 = 51 - 2 = 49\);
  7. \(48 - 24 : 8 = 48 - 3 = 45\);
  8. \(48 : 8 + 45 = 6 + 45 = 51\).