424. Выполните сложение: 1) 2/45 + 7/9; 2) 2/5 + 4/25; 3) 1/6 + 7/18; 4) 19/42 + 6/7; 5) 3/32 + 5/8; 6) 3/8 + 1/56.

1. \(\frac{2}{45}+\frac{7}{9}=\frac{2}{45}+\frac{35}{45}=\frac{37}{45}\).
2. \(\frac{2}{5}+\frac{4}{25}=\frac{10}{25}+\frac{4}{25}=\frac{14}{25}\).
3. \(\frac{1}{6}+\frac{7}{18}=\frac{3}{18}+\frac{7}{18}=\frac{10}{18}=\frac{5}{9}\).
4. \(\frac{19}{42}+\frac{6}{7}=\frac{19}{42}+\frac{36}{42}=\frac{55}{42}=1\frac{13}{42}\).
5. \(\frac{3}{32}+\frac{5}{8}=\frac{3}{32}+\frac{20}{32}=\frac{23}{32}\).
6. \(\frac{3}{8}+\frac{1}{56}=\frac{21}{56}+\frac{1}{56}=\frac{22}{56}=\frac{11}{28}\).

Ответ: 1) 37/45; 2) 14/25; 3) 5/9; 4) 1 13/42; 5) 23/32; 6) 11/28.