Odpowiedź:
[tex]2\frac{1}{3}\cdot \frac{1}{3}\cdot \:1\frac{13}{14}=\frac{7}{3}\cdot \frac{1}{3}\cdot \frac{27}{14}=\frac{189}{126}=\frac{3}{2}=1.5[/tex]
[tex]\frac{7}{8}\cdot \left(1\frac{3}{4}-\frac{5}{12}\right)=\frac{7}{8}\cdot \left(\frac{7}{4}-\frac{5}{12}\right)=\frac{7}{8}\cdot \frac{4}{3}=\frac{7}{6}=1\frac{1}{6}[/tex]
[tex]\left(9\frac{5}{14}-8\frac{6}{7}\right)\div \:3=\left(\frac{131}{14}-\frac{62}{7}\right)\div \:3=\left(\frac{131}{14}-\frac{124}{14}\right)\div \:3=\frac{1}{2}\div \:3=\frac{1}{6}[/tex]
[tex]1\frac{3}{5}\times \:1\frac{9}{16}\div \:1\frac{7}{8}=\frac{8}{5}\times \frac{25}{16}\div \frac{15}{8}=\frac{8}{5}\times \frac{25}{16}\times \frac{8}{15}=\frac{1600}{1200}=\frac{4}{3}=1\frac{1}{3}[/tex]
[tex]\left(4-3\frac{1}{6}\right)\cdot \:2\frac{2}{5}=\left(4-\frac{19}{6}\right)\cdot \frac{12}{5}=\frac{5}{6}\cdot \frac{12}{5}=2[/tex]
[tex]\frac{7}{9}\div \left(\frac{8}{9}+\frac{5}{18}\right)=\frac{7}{9}\div \left(\frac{16}{18}+\frac{5}{18}\right)=\frac{7}{9}\div \frac{21}{18}=\frac{7}{9}\div \frac{7}{6}=\frac{2}{3}[/tex]
