Question

Помогите пожалуйста!!!)))

Answer 1

$frac{7}{18} =frac{7}{2*9}; frac{5}{9}=frac{5*2}{9*2}=frac{10}{18}; \ frac{10}{21}= frac{10}{3*7}; frac{2}{3} = frac{2*7}{3*7}= frac{14}{21}; \ frac{5}{7}= frac{5*4}{7*4}= frac{20}{28}; frac{3}{4} =frac{3*7}{4*7}=frac{21}{28} ; \ 14=2*7; 20=2*10; frac{9}{14} = frac{9*10}{14*10} =frac{90}{140}; frac{13}{20}= frac{13*7}{20*7}= frac{91}{140}$


$frac{7}{9}= frac{7*11}{9*11}= frac{77}{99} textless frac{9}{11} =frac{9*9}{11*9} =frac{81}{99}$


$frac{3}{4}= frac{3*2}{4*2}= frac{6}{8} textgreater frac{3}{8} ;$


$frac{7}{12}= frac{7*5}{12*5}=frac{35}{60} textless frac{3}{5} =frac{3*12}{5*12}=frac{36}{60}$


$frac{7}{100} textless frac{3}{10}=frac{30}{100} \ \ frac{11}{17}= frac{55}{85} textgreater frac{3}{5} = frac{34}{85}$