Question

Решите плз(решение подробно).

Answer 1

Задание 1.
$\frac{5}{28} + ( - \frac{25}{42} ) \\ \frac{5}{28} - \frac{25}{42} = \frac{5 \times 3}{28 \times 3} - \frac{25 \times 2}{42 \times 2} = \frac{15}{84} - \frac{50}{84} \\ \frac{15 - 50}{84} = \frac{ - 35}{84} = - \frac{35}{84} = - \frac{5}{12}$