Ответ:\(2\frac25\cdot1\frac23=\frac{12}{5}\cdot\frac53=\frac{12\cdot5}{5\cdot3}=\frac{12}{3}=4\).\(1\frac47\cdot2\frac5{22}=\frac{11}{7}\cdot\frac{49}{22}=\frac{11\cdot49}{7\cdot22}=\frac{11\cdot7}{22}=\frac{77}{22}=\frac72=3\frac12\).