zad1
[tex]a)\sqrt{121}+\sqrt{49}-\sqrt{225}=11+7-15=18-15=3[/tex]
[tex]b)\sqrt{196}-\sqrt{169}-\sqrt{144}=14-13-12=1-12=-11[/tex]
[tex]c)\sqrt{0,25}+\sqrt{1,44}+\sqrt{6,25}=0,5+1,2+2,5=1,7+2,5=4,2[/tex]
[tex]d)\sqrt{3,61}-\sqrt{1,21}-\sqrt{0,09}=1,9-1,1-0,3=0,8-0,3=0,5[/tex]
[tex]e)\sqrt{\frac{81}{400}}+\sqrt{\frac{9}{100}}-\sqrt{\frac{64}{25}}=\frac{9}{20}+\frac{3}{10}-\frac{8}{5}=\frac{9}{20}+\frac{6}{20}-\frac{32}{20}=\frac{15}{20}-\frac{32}{20}=-\frac{17}{20}[/tex]
[tex]f)\sqrt{3\frac{6}{25}}-\sqrt{2\frac{1}{4}}+\sqrt{1\frac{7}{9}}=\sqrt{\frac{81}{25}}-\sqrt{\frac{9}{4}}+\sqrt{\frac{16}{9}}=\frac{9}{5}-\frac{3}{2}+\frac{4}{3}=\frac{54}{30}-\frac{45}{30}+\frac{40}{30}=\frac{9}{30}+\frac{40}{30}=\frac{49}{30}=1\frac{19}{30}[/tex]
