Ответ:

  1. \(\sqrt{32}\cdot\sqrt{2}=\sqrt{64}=8\).
  2. \(\sqrt{45}\cdot\sqrt{5}=\sqrt{225}=15\).
  3. \(\dfrac{\sqrt{1000}}{\sqrt{160}}=\sqrt{\dfrac{1000}{160}}=\sqrt{\dfrac{25}{4}}=\dfrac{5}{2}\).
  4. \(\dfrac{\sqrt{108}}{\sqrt{12}}=\sqrt{9}=3\).
  5. \(\sqrt{13^2-12^2}=\sqrt{169-144}=\sqrt{25}=5\).

Ответ: 8; 15; 5/2; 3; 5.