\(\displaystyle \sqrt{0,36}=\sqrt{\frac{36}{100}}=\frac{\sqrt{36}}{\sqrt{100}}=\frac6{10}=0,6\)
\(\displaystyle \sqrt{0,04}=\sqrt{\frac{4}{100}}=\frac{\sqrt{4}}{\sqrt{100}}=\frac2{10}=0,2\)
\(\displaystyle \sqrt{0,64}=\sqrt{\frac{64}{100}}=\frac{\sqrt{64}}{\sqrt{100}}=\frac8{10}=0,8\)
\(\displaystyle \sqrt{1,21}=\sqrt{\frac{121}{100}}=\frac{\sqrt{121}}{\sqrt{100}}=\frac{11}{10}=1,1\)
\(\displaystyle \sqrt{0,0049}=\sqrt{\frac{49}{10000}}=\frac{\sqrt{49}}{\sqrt{10000}}=\frac{7}{100}=0,07\)
\(\displaystyle \sqrt{0,0169}=\sqrt{\frac{169}{10000}}=\frac{\sqrt{169}}{\sqrt{10000}}=\frac{13}{100}=0,13\)