Ответ:
1) \(0.1\sqrt{900}-\frac{1}{4}\sqrt{64}=0.1\cdot30-\frac{1}{4}\cdot8=3-2=1\).
2) \(\sqrt{25}\cdot\sqrt{0.04}+\sqrt{3^3+22}=5\cdot0.2+\sqrt{27+22}=1+\sqrt{49}=1+7=8\).
3) \(4\sqrt{0.49}-\sqrt{8^2+15^2}=4\cdot0.7-\sqrt{64+225}=2.8-\sqrt{289}=2.8-17=-14.2\).
4) \(\sqrt{2\frac{2}{49}}+\sqrt{2\frac{7}{9}}-0.03\sqrt{40000}=\sqrt{\frac{100}{49}}+\sqrt{\frac{25}{9}}-0.03\cdot200=\frac{10}{7}+\frac{5}{3}-6=\frac{30+35-126}{21}=-\frac{61}{21}\).
Ответ: 1) 1; 2) 8; 3) −14,2; 4) \(-\frac{61}{21}\).
