Сравните дроби 4/12 и 7/12 5/11 и 3/11 6/19 и 6/18 9/10 и 9/12 Можно с листка??? Даю 20...

Решите задачу:

$\frac{4}{12} \ \textless \ \frac{7}{12} \\ \\ \frac{5}{11} \ \textgreater \ \frac{3}{11} \\ \\ \frac{6}{19} \ \textless \ \frac{6}{18} \\ \\ \frac{9}{10} \ \textgreater \ \frac{9}{12}$

$\frac{4}{12} = \frac{4*1}{12*1} = \frac{4}{12} \\ \\ \frac{7}{12} = \frac{7*1}{12*1} = \frac{7}{12} \\ \\ \frac{5}{11} = \frac{5*1}{11*1} = \frac{5}{11} \\ \\ \frac{3}{11} = \frac{3*1}{11*1} = \frac{3}{11} \\ \\ \frac{6}{19} = \frac{6*18}{19*18} = \frac{108}{342} \\ \\ \frac{6}{18} = \frac{6*19}{18*19} = \frac{114}{342} \\ \\ \frac{9}{10} = \frac{9*6}{10*6} = \frac{54}{60} \\ \\ \frac{9}{12} = \frac{9*5}{12*5} = \frac{45}{60}$