Ответ:

  1. \(\frac{0.3\cdot4.4}{0.8}=\frac{1.32}{0.8}=1.65\).
  2. \(5.4\cdot0.8+0.08=4.32+0.08=4.4\).
  3. \(1.4\cdot2.4+0.24=3.36+0.24=3.6\).
  4. \(2.5\cdot3.5-0.35=8.75-0.35=8.4\).
  5. \(2.1\cdot9.6=20.16\).
  6. \(16.5:1=16.5\).
  7. \(7.7\cdot5.3=40.81\).