Ответ:

  1. \(\sqrt{18\cdot200}=\sqrt{3600}=60\).
  2. \(\sqrt{3.6\cdot0.4}=\sqrt{1.44}=1.2\).
  3. \(\sqrt{14.4\cdot0.9}=\sqrt{12.96}=3.6\).
  4. \(\sqrt{13\cdot52}=\sqrt{676}=26\).
  5. \(\sqrt{12.5\cdot32}=\sqrt{400}=20\).
  6. \(\sqrt{108\cdot27}=\sqrt{2916}=54\).