Ж) 1/18 + 1/24

Ж) \( \frac{1}{18} + \frac{1}{24} = \frac{1 · 4}{18 · 4} + \frac{1 · 3}{24 · 3} = \frac{4}{72} + \frac{3}{72} = \frac{4+3}{72} = \frac{7}{72} \)