Вычислите:
а) $\frac{8}{18} - \frac{8}{27}$;
б) $\frac{7}{16} - \frac{5}{24}$;
в) $\frac{2}{11} - \frac{1}{12}$;
г) $\frac{12}{13} - \frac{15}{26}$;
д) $\frac{9}{28} - \frac{11}{35}$;
е) $\frac{39}{40} - \frac{19}{28}$.
$\frac{8}{18} - \frac{8}{27} = \frac{24 - 16}{54} = \frac{8}{54} = \frac{4 * 2}{27 * 2} = \frac{4}{27}$
$\frac{7}{16} - \frac{5}{24} = \frac{21 - 10}{48} = \frac{11}{48}$
$\frac{2}{11} - \frac{1}{12} = \frac{24 - 11}{132} = \frac{13}{132}$
$\frac{12}{13} - \frac{15}{26} = \frac{24 - 15}{26} = \frac{9}{26}$
$\frac{9}{28} - \frac{11}{35} = \frac{45 - 44}{140} = \frac{1}{140}$
$\frac{39}{40} - \frac{19}{28} = \frac{273 - 190}{280} = \frac{83}{280}$
Пожауйста, оцените решение
