2. Найдите значение выражения: a) \(\frac{9}{10} + \frac{2}{5}\) б) \(\frac{11}{20} - \frac{1}{4}\) в) \(\frac{3}{5} + \frac{1}{2}\) г) \(\frac{36}{50} - \frac{3}{25}\) д) \(\frac{8}{10} + \frac{1}{5}\) e) \(\frac{12}{30} - \frac{3}{50}\) ж) \(\frac{3}{4} + \frac{3}{12}\)

2. Найдите значение выражения:

1. \(\frac{9}{10} + \frac{2}{5} = \frac{9}{10} + \frac{4}{10} = \frac{13}{10} = 1\frac{3}{10}\)
2. \(\frac{11}{20} - \frac{1}{4} = \frac{11}{20} - \frac{5}{20} = \frac{6}{20} = \frac{3}{10}\)
3. \(\frac{3}{5} + \frac{1}{2} = \frac{6}{10} + \frac{5}{10} = \frac{11}{10} = 1\frac{1}{10}\)
4. \(\frac{36}{50} - \frac{3}{25} = \frac{36}{50} - \frac{6}{50} = \frac{30}{50} = \frac{3}{5}\)
5. \(\frac{8}{10} + \frac{1}{5} = \frac{8}{10} + \frac{2}{10} = \frac{10}{10} = 1\)
6. \(\frac{12}{30} - \frac{3}{50} = \frac{120}{300} - \frac{18}{300} = \frac{102}{300} = \frac{17}{50}\)
7. \(\frac{3}{4} + \frac{3}{12} = \frac{9}{12} + \frac{3}{12} = \frac{12}{12} = 1\)