Question

помогитеее дам 1200 баллов

Answer 1

=1/4+2/7=7/28+8/28=15/28

Answer 2

$\frac{7}{18} * \frac{9}{14}= \frac{1}{4}  \frac{1}{3}* \frac{6}{7} = \frac{2}{7} \frac{1}{4} + \frac{2}{7} = \frac{15}{28}$