Question

Помогите пожалуйста​

Answer 1

Ответ:

$(1). \frac{7}{12} + \frac{7}{20} = \frac{35 + 21}{60} = \frac{56}{60} = \frac{14}{15} ( 4.) \frac{2}{15} + \frac{7}{12} = \frac{8 + 35}{60} = \frac{43}{60} (2) \frac{3}{8} + \frac{1}{18} = \frac{27 + 4}{72} = \frac{31}{72} (5) \frac{9}{14} - \frac{5}{12} = \frac{54 - 35}{84} = \frac{19}{84} (3) \frac{1}{12} + \frac{11}{14} = \frac{7 + 66}{84} = \frac{73}{84} (6) \frac{19}{75} + \frac{7}{50} = \frac{38 + 21}{150} = \frac{59}{150}$