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