Ответ:

а) \(\frac{11}{15}-\frac4{10}+\frac1{45}=\frac{33-18+1}{45}=\frac{16}{45}\).

б) \(7-4\frac59=7-\frac{41}{9}=\frac{22}{9}=2\frac49\).

в) \(4\frac3{10}+1\frac5{12}=5+\frac{18}{60}+\frac{25}{60}=5\frac{43}{60}\).

г) \(6\frac{15}{21}+2\frac9{14}=8+\frac57+\frac9{14}=8+\frac{10}{14}+\frac9{14}=9\frac3{14}\).

д) \(5\frac16-3\frac34=2+\frac26-\frac34=2+\frac13-\frac34=1\frac7{12}\).

Ответ: а) \(\frac{16}{45}\); б) \(2\frac49\); в) \(5\frac{43}{60}\); г) \(9\frac3{14}\); д) \(1\frac7{12}\).