Используем свойства: \(\sqrt{a^2}=|a|\), \(\sqrt{ab}=\sqrt a\cdot\sqrt b\).
- \(\sqrt{9\cdot25}=3\cdot5=5\).
- \(\sqrt{16\cdot2500}=4\cdot50=200\).
- \(\sqrt{0.64\cdot36}=0.8\cdot6=4.8\).
- \(\sqrt{400\cdot1.44}=20\cdot1.2=24\).
- \(\sqrt{0.09\cdot0.04}=0.3\cdot0.2=0.06\).
- \(\sqrt{6.25\cdot0.16}=2.5\cdot0.4=1\).
- \(\sqrt{6^2\cdot3^4}=6\cdot3^2=54\).
- \(\sqrt{7^2\cdot2^8}=7\cdot2^4=112\).
- \(\sqrt{25\cdot64\cdot0.36}=5\cdot8\cdot0.6=24\).
- \(\sqrt{0.01\cdot0.81\cdot2500}=0.1\cdot0.9\cdot50=4.5\).
- \(\sqrt{\frac{81}{100}}=\frac9{10}\).
- \(\sqrt{\frac{49}{256}}=\frac7{16}\).
- \(3\frac{13}{36}=\frac{121}{36}\), поэтому \(\sqrt{3\frac{13}{36}}=\frac{11}{6}=1\frac56\).
- \(3\frac1{16}=\frac{49}{16}\), \(2\frac{14}{25}=\frac{64}{25}\). Тогда \(\sqrt{\frac{49}{16}\cdot\frac{64}{25}}=\frac{7}{4}\cdot\frac85=\frac{14}{5}=2\frac45\).
- \(\sqrt{\frac{169}{36\cdot81}}=\frac{13}{6\cdot9}=\frac{13}{54}\).
- \(\sqrt{\frac{121\cdot256}{25\cdot100}}=\frac{11\cdot16}{5\cdot10}=\frac{88}{25}=3\frac{13}{25}\).
Ответ: 1) 5; 2) 200; 3) 4,8; 4) 24; 5) 0,06; 6) 1; 7) 54; 8) 112; 9) 24; 10) 4,5; 11) 9/10; 12) 7/16; 13) 11/6; 14) 14/5; 15) 13/54; 16) 88/25.