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а) \(2\frac{4}{5}+1\frac{1}{9}=3+\frac{36+5}{45}=\mathbf{3\frac{41}{45}}\)

б) \(5\frac{7}{9}-2\frac{3}{5}=3+\frac{35-27}{45}=\mathbf{3\frac{8}{45}}\)

в) \(6\frac{2}{7}+3\frac{4}{5}=9+\frac{10+28}{35}=9+\frac{38}{35}=\mathbf{10\frac{3}{35}}\)

г) \(16\frac{4}{9}-3\frac{2}{15}=13+\frac{20-6}{45}=\mathbf{13\frac{14}{45}}\)

д) \(42\frac{7}{10}-3\frac{4}{15}=39+\frac{21-8}{30}=\mathbf{39\frac{13}{30}}\)

е) \(15\frac{11}{12}+4\frac{7}{15}=19+\frac{55+28}{60}=19+\frac{83}{60}=\mathbf{20\frac{23}{60}}\)