[tex]\it \sqrt{256} = \sqrt{4\cdot64}=2\cdot8=16
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\sqrt{0,04} =\sqrt{\dfrac{4}{100}} =\dfrac{2}{10} = 0,2
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\sqrt{2\dfrac{7}{9}} =\sqrt{\dfrac{25}{9}} =\dfrac{5}{3}
[/tex]
[tex]\it \sqrt{1\dfrac{11}{25}} =\sqrt{\dfrac{36}{25}} = \dfrac{6}{5} = 1\dfrac{1}{5}[/tex]
