1. Вычислите: a) 5/11 + 4/11; б) 17/23 - 5/23; в) 17/29 + 11/29 - 9/29. г) 7/12 + 4/12; д) 19/22 - 4/22; е) 12/27 + 14/27 - 7/27

1. Вычислите:

a) $$ \frac{5}{11} + \frac{4}{11} = \frac{5+4}{11} = \frac{9}{11} $$

Ответ: 9/11

б) $$\frac{17}{23} - \frac{5}{23} = \frac{17-5}{23} = \frac{12}{23} $$

Ответ: 12/23

в) $$\frac{17}{29} + \frac{11}{29} - \frac{9}{29} = \frac{17+11-9}{29} = \frac{19}{29} $$

Ответ: 19/29

г) $$\frac{7}{12} + \frac{4}{12} = \frac{7+4}{12} = \frac{11}{12} $$

Ответ: 11/12

д) $$\frac{19}{22} - \frac{4}{22} = \frac{19-4}{22} = \frac{15}{22} $$

Ответ: 15/22

e) $$\frac{12}{27} + \frac{14}{27} - \frac{7}{27} = \frac{12+14-7}{27} = \frac{19}{27} $$

Ответ: 19/27