Сократите дроби:
а) $\frac{20}{118}, \frac{236}{444}, \frac{66}{102}, \frac{128}{28}$;
б) $\frac{108}{72}, \frac{36}{243}, \frac{120}{168}, \frac{720}{640}$.
$\frac{20}{118} = \frac{2 * 10}{2 * 59} = \frac{10}{59}$
$\frac{236}{444} = \frac{4 * 59}{4 * 111} = \frac{59}{111}$
$\frac{66}{102} = \frac{6 * 11}{6 * 17} = \frac{11}{17}$
$\frac{128}{28} = \frac{4 * 32}{4 * 7} = \frac{32}{7}$
$\frac{108}{72} = \frac{9 * 12}{9 * 8} = \frac{12}{8} = \frac{4 * 3}{4 * 2} = \frac{3}{2}$
$\frac{36}{243} = \frac{9 * 4}{9 * 27} = \frac{4}{27}$
$\frac{120}{168} = \frac{8 * 15}{8 * 21} = \frac{15}{21} = \frac{3 * 5}{3 * 7} = \frac{5}{7}$
$\frac{720}{640} = \frac{80 * 9}{80 * 8} = \frac{9}{8}$
Посмотреть калькулятор Дроби