5.280 Выполните вычитание: a) 14-; 6) 82-; в) 5-4; г) 44-3.

$$14 - \frac{6}{9} = \frac{14 \cdot 9}{9} - \frac{6}{9} = \frac{126}{9} - \frac{6}{9} = \frac{120}{9} = 13\frac{3}{9} = 13\frac{1}{3}$$

Ответ: $$13\frac{1}{3}$$

$$82 - \frac{7}{15} = \frac{82 \cdot 15}{15} - \frac{7}{15} = \frac{1230}{15} - \frac{7}{15} = \frac{1223}{15} = 81\frac{8}{15}$$

Ответ: $$81\frac{8}{15}$$

$$5 - 4\frac{3}{4} = 5 - (4 + \frac{3}{4}) = 5 - 4 - \frac{3}{4} = 1 - \frac{3}{4} = \frac{4}{4} - \frac{3}{4} = \frac{1}{4}$$

Ответ: $$\frac{1}{4}$$

$$44 - 3\frac{8}{11} = 44 - (3 + \frac{8}{11}) = 44 - 3 - \frac{8}{11} = 41 - \frac{8}{11} = \frac{41 \cdot 11}{11} - \frac{8}{11} = \frac{451}{11} - \frac{8}{11} = \frac{443}{11} = 40\frac{3}{11}$$

Ответ: $$40\frac{3}{11}$$