Ответ:

  1. а) \(\sqrt{\sqrt{0.25}-\sqrt{0.0064}}=\sqrt{0.5-0.08}=\sqrt{0.42}=\sqrt{42}/10\).
  2. б) \(\sqrt{\sqrt{\sqrt{256}}}=\sqrt{\sqrt{16}}=\sqrt4=2\).
  3. в) \(\sqrt{46+\sqrt{13-\sqrt{16}}}=\sqrt{46+\sqrt{13-4}}=\sqrt{46+3}=7\).
  4. г) \(\sqrt{2.69-\sqrt{0.0169}}=\sqrt{2.69-0.13}=\sqrt{2.56}=1.6\).