- а) $$1 - \frac{9}{14} = \frac{14}{14} - \frac{9}{14} = \frac{14-9}{14} = \frac{5}{14}$$
- б) $$11 - \frac{7}{11} = \frac{11 \cdot 11}{11} - \frac{7}{11} = \frac{121}{11} - \frac{7}{11} = \frac{121 - 7}{11} = \frac{114}{11} = 10\frac{4}{11}$$
- в) $$5 - 2\frac{13}{24} = 4\frac{24}{24} - 2\frac{13}{24} = (4 - 2) + (\frac{24}{24} - \frac{13}{24}) = 2 + \frac{11}{24} = 2\frac{11}{24}$$
- г) $$7 - 6\frac{2}{7} = 6\frac{7}{7} - 6\frac{2}{7} = (6 - 6) + (\frac{7}{7} - \frac{2}{7}) = \frac{5}{7}$$
Ответ: а) 5/14; б) 10 4/11; в) 2 11/24; г) 5/7