Ответ:

  1. \(\sqrt{49}+\sqrt{36}=7+6=13\).
  2. \(\sqrt{81}-\sqrt{100}=9-10=-1\).
  3. \(\sqrt{0{,}01}\cdot\sqrt{25}=0{,}1\cdot5=0{,}5\).
  4. \(\sqrt{64}:\sqrt{0{,}04}=8:0{,}2=40\).
  5. \(\sqrt{36:9}=\sqrt4=2\).
  6. \(\sqrt{1600:100}=\sqrt{16}=4\).

Ответ: 13; −1; 0,5; 40; 2; 4.