Ответ:
Применяем свойство \(\sqrt{ab}=\sqrt a\cdot\sqrt b\).
- \(\sqrt{36\cdot81}=6\cdot9=54\).
- \(\sqrt{900\cdot49}=30\cdot7=210\).
- \(\sqrt{16\cdot0.25}=4\cdot0.5=2\).
- \(\sqrt{9\cdot1.69}=3\cdot1.3=3.9\).
- \(\sqrt{0.36\cdot1.21}=0.6\cdot1.1=0.66\).
- \(\sqrt{5^2\cdot3^6}=5\cdot3^3=135\).
- \(\sqrt{4^4\cdot3^2}=4^2\cdot3=48\).
- \(\sqrt{2^6\cdot5^2}=2^3\cdot5=40\).
- \(\sqrt{2.25\cdot0.04\cdot1600}=1.5\cdot0.2\cdot40=12\).
- \(\sqrt{13\frac49}=\sqrt{\frac{121}{9}}=\frac{11}{3}\).
- \(\sqrt{1\frac79\cdot\frac4{25}}=\sqrt{\frac{16}{9}\cdot\frac4{25}}=\frac8{15}\).
- \(\sqrt{\frac1{16}\cdot\frac9{25}}=\frac14\cdot\frac35=\frac3{20}\).
Ответ: 1) 54; 2) 210; 3) 2; 4) 3,9; 5) 0,66; 6) 135; 7) 48; 8) 40; 9) 12; 10) 11/3; 11) 8/15; 12) 3/20.
