Ответ:

  1. \(\sqrt{36}\cdot\sqrt{16}=6\cdot4=24\).
  2. \(\sqrt{81}:\sqrt{100}=9:10=0.9\).
  3. \(\sqrt{0.09}+\sqrt{0.25}=0.3+0.5=0.8\).
  4. \(\sqrt{0.04}-\sqrt{0.01}=0.2-0.1=0.1\).
  5. \(3\sqrt9-16=3\cdot3-16=-7\).
  6. \(-7\sqrt{0.36}+5.4=-7\cdot0.6+5.4=1.2\).
  7. \(0.1\sqrt{400}+0.2\sqrt{1600}=0.1\cdot20+0.2\cdot40=10\).
  8. \(\frac13\sqrt{0.36}+\frac15\sqrt{900}=\frac13\cdot0.6+\frac15\cdot30=6.2\).

Ответ: 24; 0,9; 0,8; 0,1; −7; 1,2; 10; 6,2.