Ответ:

а) \(15\sqrt{\frac{2}{5}}-\sqrt{160}=15\cdot\frac{\sqrt{10}}{5}-4\sqrt{10}=3\sqrt{10}-4\sqrt{10}=-\sqrt{10}.\)

б) \(\sqrt{135}+10\sqrt{0.6}=3\sqrt{15}+10\cdot\frac{\sqrt{15}}{5}=3\sqrt{15}+2\sqrt{15}=5\sqrt{15}.\)

в) \(6\sqrt{1\frac{1}{3}}-\sqrt{27}=6\sqrt{\frac{4}{3}}-3\sqrt{3}=4\sqrt{3}-3\sqrt{3}=\sqrt{3}.\)

г) \(0.5\sqrt{24}+10\sqrt{\frac{3}{8}}=\sqrt{6}+10\cdot\frac{\sqrt{6}}{4}=\sqrt{6}+\frac{5}{2}\sqrt{6}=\frac{7}{2}\sqrt{6}.\)

Ответ: а) −√10; б) 5√15; в) √3; г) (7/2)√6.