Ответ:
- \(0.5\sqrt{1600}-\frac{1}{3}\sqrt{36}=0.5\cdot40-\frac{1}{3}\cdot6=20-2=18\).
- \(\sqrt{0.25\cdot81}=\sqrt{20.25}=4.5\).
- \(\sqrt{6^2\cdot2^8}=\sqrt{36\cdot256}=6\cdot16=96\).
- \(\sqrt{20}\cdot\sqrt5-\frac{\sqrt{63}}{\sqrt7}=\sqrt{100}-\sqrt9=10-3=7\).
Ответ: 1) 18; 2) 4,5; 3) 96; 4) 7.
