Ответ:
\[\left(\frac{11}{45}-\frac19\right)+\left(\frac{12}{15}-\frac3{10}\right)=\left(\frac{11}{45}-\frac5{45}\right)+\left(\frac45-\frac3{10}\right)=\frac6{45}+\frac5{10}=\frac2{15}+\frac12=\frac4{30}+\frac{15}{30}=\frac{19}{30}.\]
Ответ: \(\frac{19}{30}\).
