10. Выполните вычитание: а) \(\frac7{11}-\frac7{33}\); б) \(\frac7{11}-\frac7{12}\); в) \(\frac{13}{30}-\frac2{45}\); г) \(\frac7{15}-\frac25\); д) \(\frac{13}{60}-\frac7{40}\); е) \(\frac{11}{21}-\frac3{14}\).

а) \(\frac7{11}-\frac7{33}=\frac{21}{33}-\frac7{33}=\frac{14}{33}\).

б) \(\frac7{11}-\frac7{12}=\frac{84}{132}-\frac{77}{132}=\frac7{132}\).

в) \(\frac{13}{30}-\frac2{45}=\frac{39}{90}-\frac4{90}=\frac{35}{90}=\frac7{18}\).

г) \(\frac7{15}-\frac25=\frac7{15}-\frac6{15}=\frac1{15}\).

д) \(\frac{13}{60}-\frac7{40}=\frac{26}{120}-\frac{21}{120}=\frac5{120}=\frac1{24}\).

е) \(\frac{11}{21}-\frac3{14}=\frac{22}{42}-\frac9{42}=\frac{13}{42}\).