Вычислите в)7/12 - 5/24 ; е)19/45+4/15 и) 11/13-20/39 м) 29/64 + 3/8

Решите задачу:

$\frac{7}{12} - \frac{5}{24} = \frac{14-5}{24} = \frac{9}{24} = \frac{3}{8} \\ \\ \frac{19}{45} + \frac{4}{15} = \frac{19+12}{45} = \frac{31}{45} \\ \\ \frac{11}{13} - \frac{20}{39} = \frac{33-20}{39} = \frac{13}{39}= \frac{1}{3} \\ \\ \frac{29}{64} + \frac{3}{8} = \frac{29+24}{64} = \frac{53}{64}$