Question

Предварите соератив дроби найдите значение выражения

Answer 1

$\frac{3}{12} + \frac{25}{30} = \frac{3}{12} + \frac{5}{6} = \frac{3 + 10}{12} = \frac{13}{12}$

$\frac{10}{24} - \frac{21}{54} = \frac{5}{12} - \frac{7}{18} = \frac{15 - 14}{36} = \frac{1}{36}$

Готово.

Answer 2

1)15/60+60/60=65/60=1 5/60
2)90/216-84/216=6/216