Ответ:

[tex]0,8\sqrt{3\frac{1}{16}}+\frac{1}{3} \sqrt{0,81}=0,8\sqrt{\frac{49}{16}}+\frac{1}{3}*0,9= \frac{8}{10}* \frac{7}{4} +\frac{1}{3}* \frac{9}{10}= \frac{14}{10}+ \frac{3}{10}= \frac{17}{10}=1,7[/tex]