a)[tex]\sqrt{16} +\sqrt{256} =4+16=20\\[/tex]
b) [tex]\sqrt{169} -\sqrt{196} =13-14=-1[/tex]
c) [tex]\sqrt{0,36} =\sqrt{\frac{36}{100}} =\frac{6}{10}[/tex]
d)[tex]\sqrt{2,25} =\sqrt{\frac{225}{100} } =\frac{15}{10}[/tex]
e)[tex]\sqrt{\frac{1}{16} } =\frac{1}{4}[/tex]
f) [tex]\sqrt{\frac{1}{49} } =\frac{1}{7}[/tex]
