м) \(\frac{9}{180} + \frac{7}{120}\)
- \(\frac{9}{180} + \frac{7}{120} = \frac{9 \cdot 2}{180 \cdot 2} + \frac{7 \cdot 3}{120 \cdot 3} = \frac{18}{360} + \frac{21}{360} = \frac{18 + 21}{360} = \frac{39}{360} = \frac{3 \cdot 13}{3 \cdot 120} = \frac{13}{120}\)
Ответ: \(\frac{13}{120}\)