1. Выполните действия: а) 7\24 - 5\ 18 б)4\35+1\28 в)5\16+11\12 г)11\63 - 5\42

Решите задачу:

$\frac{7}{24} - \frac{5}{18} = \frac{21-20}{72} = \frac{1}{72}$
$\frac{4}{35} + \frac{1}{28} = \frac{16+5}{140} = \frac{21}{140} = \frac{3}{20} = 0.15$
$\frac{5}{16} + \frac{11}{12} = \frac{15+44}{48} = \frac{49}{48} = 1\frac{1}{48}$
$\frac{11}{63} - \frac{5}{42} = \frac{22-15}{126} = \frac{7}{126} = \frac{1}{18}$