[tex]8)\\\\(1\frac{2}{3}+0,5)*(5\frac{2}{5}-3,9)= (1\frac{2}{3}+ \frac{1}{2})*(5\frac{2}{5}-3 \frac{9}{10})= (1\frac{4}{6}+ \frac{3}{6})*(5\frac{4}{10}-3 \frac{9}{10}) =\\\\\\= 1\frac{7}{6}*( 4\frac{14}{10}-3 \frac{9}{10}) =\frac{13}{6}*1\frac{5}{10}=\frac{13}{6}* \frac{15}{10}=\frac{13}{\not{6}^2}* \frac{\not{3}^1}{2}=\frac{13}{4}=3\frac{1}{4}[/tex]
[tex]8)\\\\ (1,5+ \frac{2}{3})*(6\frac{2}{5}-4,9)=(1 \frac{1}{2}+ \frac{2}{3})*(6\frac{2}{5}-4\frac{ 9}{10})=(1 \frac{3}{6}+ \frac{4}{6})*(6\frac{4}{10}-4\frac{ 9}{10}) =\\\\\\= 1 \frac{7}{6} *(5\frac{14}{10}-4\frac{ 9}{10}) = \frac{13}{6}*1\frac{5}{10} = \frac{13}{6}*1\frac{1}{2}= \frac{13}{\not{6}^2}* \frac{\not{3}^1}{2}=\frac{13}{4}=3\frac{1}{4}[/tex]
