Question

5/6*3/5-5/12*4/15, 7/18*9/14+1/3*6/7,9/20*2/3+5/14*7/25,3 3/4*2/5-3 6/25*5/27, 2 2/5*5/6-3/4* 1 2/3

Answer 1

$frac{5}{6}* frac{3}{5}- frac{5}{12}* frac{4}{15}= frac{15}{30} - frac{20}{180} = frac{1}{2}- frac{1}{9} = frac{7}{18}$

Answer 2

И всё???

Answer 3

Так мало не может быть