Реши примеры с дробями из классной работы

Решаем примеры по порядку: 1) $\frac{3}{9} + \frac{5}{9} = \frac{3+5}{9} = \frac{8}{9}$ 2) $\frac{12}{19} + \frac{16}{19} = \frac{12+16}{19} = \frac{28}{19}$ 3) $\frac{14}{20} - \frac{6}{20} = \frac{14-6}{20} = \frac{8}{20} = \frac{2}{5}$ 4) $1 - \frac{9}{14} = \frac{14}{14} - \frac{9}{14} = \frac{14-9}{14} = \frac{5}{14}$ 5) $2 - \frac{3}{12} = \frac{24}{12} - \frac{3}{12} = \frac{24-3}{12} = \frac{21}{12} = \frac{7}{4}$ 6) $5 \frac{2}{10} - \frac{6}{10} = 5 \frac{2}{10} - \frac{6}{10} = 4 + 1 \frac{2}{10} - \frac{6}{10} = 4 + \frac{12}{10} - \frac{6}{10} = 4 \frac{6}{10} = 4 \frac{3}{5}$ 7) $\frac{14}{3} = 4 \frac{2}{3}$ 8) $\frac{25}{8} = 3 \frac{1}{8}$ 9) $1 \frac{6}{7} = \frac{1 \cdot 7 + 6}{7} = \frac{13}{7}$ 10) $5 \frac{3}{8} = \frac{5 \cdot 8 + 3}{8} = \frac{43}{8}$