\(8,\dfrac{5}{11}+\dfrac{4}{55}+\dfrac{13}{22}=\dfrac{50}{110}+\dfrac{8}{110}+\dfrac{65}{110}=\dfrac{123}{110}\\ 9,\dfrac{-1}{15}+\dfrac{2}{9}+\dfrac{4}{5}=\dfrac{-3}{45}+\dfrac{10}{45}+\dfrac{36}{45}=\dfrac{43}{45}\\ 10,\dfrac{7}{6}+\dfrac{-21}{9}+\dfrac{1}{12}=\dfrac{42}{36}-\dfrac{84}{36}+\dfrac{3}{36}=\dfrac{-39}{36}=\dfrac{-13}{12}\)
8, \(\dfrac{5}{11}+\dfrac{4}{55}+\dfrac{13}{22}=\dfrac{23}{22}+\dfrac{4}{55}=\dfrac{115+8}{110}=\dfrac{123}{110}\)
9, \(-\dfrac{1}{15}+\dfrac{2}{9}+\dfrac{4}{5}=\dfrac{-3+10+36}{45}=\dfrac{43}{45}\)
10, \(\dfrac{7}{6}-\dfrac{21}{9}+\dfrac{1}{12}=\dfrac{15}{12}-\dfrac{7}{3}=-\dfrac{13}{12}\)
