Ответ:
а) \(\frac15<\frac3{10}\); \(\frac12<\frac34\).
б) \(\frac35>\frac{21}{40}\); \(\frac7{12}<\frac{39}{48}\).
в) \(\frac27>\frac1{15}\); \(\frac5{13}<\frac5{11}\).
г) \(2=\frac42\); \(\frac5{18}<\frac7{15}\).
а) \(\frac15<\frac3{10}\); \(\frac12<\frac34\).
б) \(\frac35>\frac{21}{40}\); \(\frac7{12}<\frac{39}{48}\).
в) \(\frac27>\frac1{15}\); \(\frac5{13}<\frac5{11}\).
г) \(2=\frac42\); \(\frac5{18}<\frac7{15}\).