221. Выполните действие и сократите результат: 1) \(\frac{7}{12} + \frac{3}{12}\); 2) \(\frac{32}{39} - \frac{6}{39}\); 3) \(4 \frac{17}{45} + 3 \frac{13}{45}\); 4) \(9 \frac{59}{63} - 5 \frac{24}{63}\);

1) \(\frac{7}{12} + \frac{3}{12} = \frac{7+3}{12} = \frac{10}{12} = \frac{5}{6}\) 2) \(\frac{32}{39} - \frac{6}{39} = \frac{32-6}{39} = \frac{26}{39} = \frac{2}{3}\) 3) \(4 \frac{17}{45} + 3 \frac{13}{45} = (4+3) + (\frac{17}{45} + \frac{13}{45}) = 7 + \frac{30}{45} = 7 + \frac{2}{3} = 7 \frac{2}{3}\) 4) \(9 \frac{59}{63} - 5 \frac{24}{63} = (9-5) + (\frac{59}{63} - \frac{24}{63}) = 4 + \frac{35}{63} = 4 + \frac{5}{9} = 4 \frac{5}{9}\)