Ответ:

  1. \(\sqrt{64\cdot36}=8\cdot6=48\).
  2. \(\sqrt{0{,}04\cdot81}=0{,}2\cdot9=1{,}8\).
  3. \(\sqrt{0{,}25\cdot0{,}09\cdot144}=0{,}5\cdot0{,}3\cdot12=1{,}8\).
  4. \(\sqrt{45}\cdot\sqrt{5}=\sqrt{225}=15\).
  5. \(\sqrt{160}\cdot\sqrt{250}=\sqrt{40000}=200\).
  6. \(\frac{\sqrt{108}}{\sqrt{3}}=\sqrt{36}=6\).
  7. \(\frac{\sqrt{90}}{\sqrt{0{,}016}}=\sqrt{5625}=75\).

Ответ: 48; 1,8; 1,8; 15; 200; 6; 75.