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) $$14 - \frac{6}{9}$$

$$14 - \frac{6}{9} = 13 + 1 - \frac{6}{9} = 13 + \frac{9}{9} - \frac{6}{9} = 13 + \frac{3}{9} = 13\frac{3}{9} = 13\frac{1}{3}$$

Ответ: $$13\frac{1}{3}$$

б) $$82 - \frac{7}{15}$$

$$82 - \frac{7}{15} = 81 + 1 - \frac{7}{15} = 81 + \frac{15}{15} - \frac{7}{15} = 81 + \frac{8}{15} = 81\frac{8}{15}$$

Ответ: $$81\frac{8}{15}$$

в) $$5 - 4\frac{3}{4}$$

$$5 - 4\frac{3}{4} = 5 - 4 - \frac{3}{4} = 1 - \frac{3}{4} = \frac{4}{4} - \frac{3}{4} = \frac{1}{4}$$

Ответ: $$\frac{1}{4}$$

г) $$44 - 3\frac{8}{11}$$

$$44 - 3\frac{8}{11} = 44 - 3 - \frac{8}{11} = 41 - \frac{8}{11} = 40 + 1 - \frac{8}{11} = 40 + \frac{11}{11} - \frac{8}{11} = 40 + \frac{3}{11} = 40\frac{3}{11}$$

Ответ: $$40\frac{3}{11}$$