Ответ:

  1. \(\sqrt{\frac{1{,}44}{3{,}61}}=\frac{1{,}2}{1{,}9}=\frac{12}{19}\).
  2. \(\sqrt{11\frac{1}{9}}=\sqrt{\frac{100}{9}}=\frac{10}{3}=3\frac{1}{3}\).
  3. \(\sqrt{1\frac{13}{36}\cdot3\frac{13}{36}}=\sqrt{\frac{49}{36}\cdot\frac{121}{36}}=\frac{77}{36}=2\frac{5}{36}\).
  4. \(\sqrt{\frac{1}{144}\cdot2\frac{2}{49}}=\sqrt{\frac{1}{144}\cdot\frac{100}{49}}=\frac{10}{84}=\frac{5}{42}\).
  5. \(\sqrt{\frac{1}{9}\cdot0{,}04\cdot64}=\sqrt{\frac{64}{225}}=\frac{8}{15}\).
  6. \(\sqrt{1\frac{9}{16}\cdot2\frac{1}{4}\cdot2\frac{7}{9}}=\sqrt{\frac{25}{16}\cdot\frac{9}{4}\cdot\frac{25}{9}}=\frac{25}{8}\).

Ответ: а) \(\frac{12}{19}\); б) \(3\frac{1}{3}\); в) \(2\frac{5}{36}\); г) \(\frac{5}{42}\); д) \(\frac{8}{15}\); е) \(\frac{25}{8}\).