Question

помогите умоляю пжпжпжпж​

Answer 1

$\frac{1}{6} \times 8.4 + \frac{5}{12} \times 8.4 = \frac{49}{10} = 4 \frac{9}{10} = 4.9$

$\frac{5}{9} + \frac{m}{n} = \frac{n \times 5}{n \times 9} + \frac{m}{n} = \frac{5n}{9n} + \frac{9m}{9n} = \frac{5n \times 9m}{9n}$

Готово, удачки тебе))