5.200 Вычислите: a) 13 + 13; 1 6)+4; 6' 6 3 B) 17 17; 13 7 г) 35 35

Решение:

а) \[\frac{5}{13} + \frac{2}{13} - \frac{4}{13} = \frac{5+2-4}{13} = \frac{3}{13}\]

б) \[\frac{7}{21} + \frac{12}{21} - \frac{9}{21} = \frac{7+12-9}{21} = \frac{10}{21}\]

в) \[\frac{12}{22} - \frac{5}{22} - \frac{5}{22} = \frac{12-5-5}{22} = \frac{2}{22} = \frac{1}{11}\]

г) \[\frac{25}{53} - \frac{10}{53} + \frac{3}{53} = \frac{25-10+3}{53} = \frac{18}{53}\]

Ответ: \[\frac{3}{13}, \frac{10}{21}, \frac{1}{11}, \frac{18}{53}\]