5.280 Выполните вычитание: a) 14 - $$\frac{6}{9}$$; б) 82 - $$\frac{7}{15}$$; в) 5 - 4$$\frac{3}{4}$$; г) 44 - 3$$\frac{8}{11}$$

a) $$14 - \frac{6}{9} = 13 + 1 - \frac{6}{9} = 13 + \frac{9}{9} - \frac{6}{9} = 13 + \frac{3}{9} = 13\frac{3}{9} = 13\frac{1}{3}$$ б) $$82 - \frac{7}{15} = 81 + 1 - \frac{7}{15} = 81 + \frac{15}{15} - \frac{7}{15} = 81 + \frac{8}{15} = 81\frac{8}{15}$$ в) $$5 - 4\frac{3}{4} = 5 - (4 + \frac{3}{4}) = 5 - 4 - \frac{3}{4} = 1 - \frac{3}{4} = \frac{4}{4} - \frac{3}{4} = \frac{1}{4}$$ г) $$44 - 3\frac{8}{11} = 44 - (3 + \frac{8}{11}) = 44 - 3 - \frac{8}{11} = 41 - \frac{8}{11} = 40 + 1 - \frac{8}{11} = 40 + \frac{11}{11} - \frac{8}{11} = 40 + \frac{3}{11} = 40\frac{3}{11}$$