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. \(14.2\cdot1.4+0.24=19.88+0.24=20.12\).
  4. \(2.5\cdot3.5-0.35=8.75-0.35=8.4\).
  5. \(2.1\cdot9.6=20.16\).
  6. \(1.6\cdot5.1=8.16\).
  7. \(7.7\cdot5.3=40.81\).

Ответ: 24) 1.65; 25) 4.4; 26) 20.12; 27) 8.4; 28) 20.16; 29) 8.16; 30) 40.81.