58. Выполните сложение или вычитание:

1) $\frac{7}{48} + \frac{11}{36} = \frac{21}{144} + \frac{44}{144} = \frac{65}{144}$ 2) $\frac{26}{45} - \frac{16}{30} = \frac{52}{90} - \frac{48}{90} = \frac{4}{90} = \frac{2}{45}$ 3) $\frac{13}{18} - \frac{5}{24} = \frac{52}{72} - \frac{15}{72} = \frac{37}{72}$ 4) $1 + \frac{3}{8} = \frac{8}{8} + \frac{3}{8} = \frac{11}{8} = 1\frac{3}{8}$ 5) $2 - \frac{5}{6} = \frac{12}{6} - \frac{5}{6} = \frac{7}{6} = 1\frac{1}{6}$ 6) $\frac{5}{13} + \frac{7}{26} = \frac{10}{26} + \frac{7}{26} = \frac{17}{26}$ 7) $\frac{11}{63} - \frac{1}{9} = \frac{11}{63} - \frac{7}{63} = \frac{4}{63}$ 8) $\frac{12}{15} - \frac{3}{5} = \frac{4}{5} - \frac{3}{5} = \frac{1}{5}$ 9) $5 + \frac{4}{9} = 5\frac{4}{9} = \frac{49}{9}$ 10) $4 - \frac{7}{11} = \frac{44}{11} - \frac{7}{11} = \frac{37}{11} = 3\frac{4}{11}$ 11) $\frac{7}{12} + \frac{4}{36} = \frac{21}{36} + \frac{4}{36} = \frac{25}{36}$ 12) $\frac{15}{27} - \frac{1}{9} = \frac{5}{9} - \frac{1}{9} = \frac{4}{9}$ 13) $\frac{11}{14} - \frac{1}{7} = \frac{11}{14} - \frac{2}{14} = \frac{9}{14}$ 14) $4 + \frac{2}{7} = 4\frac{2}{7} = \frac{30}{7}$ 15) $5 - \frac{4}{9} = \frac{45}{9} - \frac{4}{9} = \frac{41}{9} = 4\frac{5}{9}$