197. Выполни действия:

197. Выполни действия:

1. \( \frac{1}{2} + \frac{1}{3} = \frac{3}{6} + \frac{2}{6} = \frac{5}{6} \)
2. \( \frac{1}{4} - \frac{1}{5} = \frac{5}{20} - \frac{4}{20} = \frac{1}{20} \)
3. \( \frac{3}{5} + \frac{4}{7} = \frac{21}{35} + \frac{20}{35} = \frac{41}{35} = 1\frac{6}{35} \)
4. \( \frac{5}{9} - \frac{3}{8} = \frac{40}{72} - \frac{27}{72} = \frac{13}{72} \)
5. \( \frac{1}{6} + \frac{1}{12} = \frac{2}{12} + \frac{1}{12} = \frac{3}{12} = \frac{1}{4} \)
6. \( \frac{2}{3} - \frac{4}{27} = \frac{18}{27} - \frac{4}{27} = \frac{14}{27} \)
7. \( \frac{23}{25} + \frac{4}{5} = \frac{23}{25} + \frac{20}{25} = \frac{43}{25} = 1\frac{18}{25} \)
8. \( \frac{29}{60} - \frac{7}{30} = \frac{29}{60} - \frac{14}{60} = \frac{15}{60} = \frac{1}{4} \)
9. \( \frac{7}{9} + \frac{5}{12} = \frac{28}{36} + \frac{15}{36} = \frac{43}{36} = 1\frac{7}{36} \)
10. \( \frac{11}{12} - \frac{5}{18} = \frac{33}{36} - \frac{10}{36} = \frac{23}{36} \)
11. \( \frac{3}{8} + \frac{19}{20} = \frac{15}{40} + \frac{38}{40} = \frac{53}{40} = 1\frac{13}{40} \)
12. \( \frac{5}{6} - \frac{8}{15} = \frac{25}{30} - \frac{16}{30} = \frac{9}{30} = \frac{3}{10} \)
13. \( \frac{17}{20} + \frac{11}{15} = \frac{51}{60} + \frac{44}{60} = \frac{95}{60} = 1\frac{35}{60} = 1\frac{7}{12} \)
14. \( \frac{19}{42} - \frac{5}{63} = \frac{57}{126} - \frac{10}{126} = \frac{47}{126} \)
15. \( \frac{16}{21} + \frac{13}{15} = \frac{80}{105} + \frac{91}{105} = \frac{171}{105} = 1\frac{66}{105} = 1\frac{22}{35} \)
16. \( \frac{21}{22} - \frac{3}{55} = \frac{105}{110} - \frac{6}{110} = \frac{99}{110} = \frac{9}{10} \)