Question

5/3.(1/2+1/4)
2/5.(10/7-5/7)
3/4+4/3).(8/7-7/8)

Answer 1

$\frac{5}{3}.( \frac{1}{2}+ \frac{1}{4} )= \frac{5}{3}.( \frac{2+1}{4} )= \frac{5}{3}. \frac{3}{4}= \frac{5}{1}. \frac{1}{4}= \frac{5}{4}$

$\frac{2}{5}.( \frac{10}{7}- \frac{5}{7} )= \frac{2}{5}.( \frac{10-5}{7} )= \frac{2}{5}. \frac{5}{7}= \frac{2}{1}. \frac{1}{7}= \frac{2}{7}$

$( \frac{3}{4}+ \frac{4}{3} ).( \frac{8}{7}- \frac{7}{8} )=( \frac{9+16}{12}).( \frac{64-49}{56} )=\frac{25}{12}. \frac{15}{56}=\frac{25}{4}.\frac{5}{56}= \frac{125}{224}$