Ответ:

  1. (32 + 48) : 5 = 80 : 5 = 16.
  2. (100 − 86) × 3 = 14 × 3 = 42.
  3. 320 : 4 = 80.
  4. (15 × 6) : 9 = 90 : 9 = 10.
  5. 6300 : 70 = 90.
  6. (54 : 9) + 36 = 6 + 36 = 42.
  7. (9 × 7) × 10 = 63 × 10 = 630.
  8. (40 × 30) : 4 = 1200 : 4 = 300.
  9. (46 + 34) × 10 = 80 × 10 = 800.