Реши пример 810 а) $\frac{1}{2} + \frac{1}{2}$

Решаю примеры на сложение и вычитание дробей. 810 a) $\frac{1}{2} + \frac{1}{2} = \frac{1+1}{2} = \frac{2}{2} = 1$ 810 б) $\frac{1}{7} + \frac{5}{7} = \frac{1+5}{7} = \frac{6}{7}$ 810 в) $\frac{3}{5} + \frac{4}{5} = \frac{3+4}{5} = \frac{7}{5} = 1\frac{2}{5}$ 810 г) $1\frac{1}{3} + \frac{2}{3} = \frac{4}{3} + \frac{2}{3} = \frac{4+2}{3} = \frac{6}{3} = 2$ 810 д) $2\frac{7}{9} + \frac{4}{9} = \frac{25}{9} + \frac{4}{9} = \frac{25+4}{9} = \frac{29}{9} = 3\frac{2}{9}$ 810 e) $3\frac{2}{5} + 12\frac{4}{5} = \frac{17}{5} + \frac{64}{5} = \frac{17+64}{5} = \frac{81}{5} = 16\frac{1}{5}$ 811 a) $\frac{9}{11} - \frac{8}{11} = \frac{9-8}{11} = \frac{1}{11}$ 811 б) $\frac{6}{7} - \frac{2}{7} = \frac{6-2}{7} = \frac{4}{7}$ 811 в) $1 - \frac{1}{9} = \frac{9}{9} - \frac{1}{9} = \frac{9-1}{9} = \frac{8}{9}$ 811 г) $12 - \frac{1}{3} = \frac{36}{3} - \frac{1}{3} = \frac{36-1}{3} = \frac{35}{3} = 11\frac{2}{3}$ 811 д) $127 - \frac{2}{5} = \frac{635}{5} - \frac{2}{5} = \frac{635-2}{5} = \frac{633}{5} = 126\frac{3}{5}$ 811 e) $193 - \frac{4}{9} = \frac{1737}{9} - \frac{4}{9} = \frac{1737-4}{9} = \frac{1733}{9} = 192\frac{5}{9}$ 811 ж) $13\frac{3}{4} - \frac{1}{2} = \frac{55}{4} - \frac{1}{2} = \frac{55}{4} - \frac{2}{4} = \frac{55-2}{4} = \frac{53}{4} = 13\frac{1}{4}$ 811 з) $13\frac{1}{2} - \frac{1}{3} = \frac{27}{2} - \frac{1}{3} = \frac{81}{6} - \frac{2}{6} = \frac{81-2}{6} = \frac{79}{6} = 13\frac{1}{6}$ 811 и) $15\frac{4}{5} - 8\frac{2}{5} = \frac{79}{5} - \frac{42}{5} = \frac{79-42}{5} = \frac{37}{5} = 7\frac{2}{5}$ 811 к) $20\frac{3}{8} - 16\frac{1}{4} = \frac{163}{8} - \frac{65}{4} = \frac{163}{8} - \frac{130}{8} = \frac{163-130}{8} = \frac{33}{8} = 4\frac{1}{8}$ 811 л) $3\frac{1}{6} - \frac{1}{3} = \frac{19}{6} - \frac{1}{3} = \frac{19}{6} - \frac{2}{6} = \frac{19-2}{6} = \frac{17}{6} = 2\frac{5}{6}$ 811 м) $2\frac{1}{2} - \frac{1}{2} = \frac{5}{2} - \frac{1}{2} = \frac{5-1}{2} = \frac{4}{2} = 2$ 811 н) $10\frac{1}{5} - \frac{2}{5} = \frac{51}{5} - \frac{2}{5} = \frac{51-2}{5} = \frac{49}{5} = 9\frac{4}{5}$ 811 o) $\frac{3}{7} - \frac{4}{5} = \frac{15}{35} - \frac{28}{35} = \frac{15-28}{35} = -\frac{13}{35}$ 811 п) $3\frac{1}{2} - 2\frac{2}{3} = \frac{7}{2} - \frac{8}{3} = \frac{21}{6} - \frac{16}{6} = \frac{21-16}{6} = \frac{5}{6}$