Ответ:

  1. \(\sqrt{81\cdot16}=9\cdot4=36\).
  2. \(\sqrt{0{,}09\cdot25}=0{,}3\cdot5=1{,}5\).
  3. \(\sqrt{0{,}01\cdot0{,}04\cdot121}=0{,}1\cdot0{,}2\cdot11=0{,}22\).
  4. \(\sqrt{72}\cdot\sqrt{2}=\sqrt{144}=12\).
  5. \(\sqrt{360}\cdot\sqrt{490}=\sqrt{176400}=420\).
  6. \(\frac{\sqrt{242}}{\sqrt{2}}=\sqrt{121}=11\).
  7. \(\frac{\sqrt{40}}{\sqrt{0{,}025}}=\sqrt{1600}=40\).

Ответ: 36; 1,5; 0,22; 12; 420; 11; 40.