364. Упростите: 1) \(\dfrac{\sqrt{27}}{\sqrt{3}}\); 2) \(\dfrac{\sqrt{128}}{\sqrt{8}}\); 3) \(\dfrac{4\sqrt{40}}{\sqrt{10}}\); 4) \(\dfrac{20\sqrt{18}}{5\sqrt{2}}\).

1. \(\dfrac{\sqrt{27}}{\sqrt{3}}=\sqrt{\dfrac{27}{3}}=\sqrt{9}=3\).
2. \(\dfrac{\sqrt{128}}{\sqrt{8}}=\sqrt{\dfrac{128}{8}}=\sqrt{16}=4\).
3. \(\dfrac{4\sqrt{40}}{\sqrt{10}}=4\sqrt{\dfrac{40}{10}}=4\sqrt{4}=8\).
4. \(\dfrac{20\sqrt{18}}{5\sqrt{2}}=4\sqrt{\dfrac{18}{2}}=4\sqrt{9}=12\).

Ответ: 1) 3; 2) 4; 3) 8; 4) 12.