5.300 Найдите разность: a) 130-4; (6) 17읍 - 50: ㅍ) 9 - 3%; 14

a) $$13\frac{8}{9}-4$$

$$13\frac{8}{9} - 4 = 9\frac{8}{9}$$

б) $$17\frac{5}{14}-5\frac{3}{14}$$

$$17\frac{5}{14}-5\frac{3}{14} = (17 - 5) + (\frac{5}{14} - \frac{3}{14}) = 12 + \frac{2}{14} = 12\frac{1}{7}$$

в) $$9\frac{5}{7}-3\frac{6}{7}$$

$$9\frac{5}{7}-3\frac{6}{7} = 8\frac{12}{7} - 3\frac{6}{7} = (8-3) + (\frac{12}{7} - \frac{6}{7}) = 5 + \frac{6}{7} = 5\frac{6}{7}$$

Ответ: a) $$9\frac{8}{9}$$; б) $$12\frac{1}{7}$$; в) $$5\frac{6}{7}$$