Ответ:

  1. \(3\sqrt{9}+5\sqrt{16}=3\cdot3+5\cdot4=9+20=29\).
  2. \((\sqrt{36}-\sqrt{4})\cdot\sqrt{25}=(6-2)\cdot5=20\).
  3. \(\sqrt{81+144}=\sqrt{225}=15\).
  4. \(\sqrt{132^2-122^2}=\sqrt{(132-122)(132+122)}=\sqrt{10\cdot254}=\sqrt{2540}=2\sqrt{635}\).
  5. \(\frac{1}{2}\sqrt{144}-\frac{1}{3}\sqrt{81}=\frac{1}{2}\cdot12-\frac{1}{3}\cdot9=6-3=3\).
  6. \(\sqrt{1.44}+\sqrt{0.25}-\sqrt{0.04}=1.2+0.5-0.2=1.5\).

Ответ: 1) 29; 2) 20; 3) 15; 4) \(2\sqrt{635}\); 5) 3; 6) 1,5.