Question

Приведите обыкновенные дроби 1 и 3 2 и 3 1 и 5 2 и 5 4 и 5 1 и 6 5 и 6 5 и 6 3 и 10 7 и 10 9 и 10 к обыкновенной дроби со знаменателем 30

Answer 1

$\frac{1}{3} = \frac{10}{30} \\ \frac{2}{3} = \frac{2 \times 10}{3 \times 10} = \frac{20}{30} \\ \frac{1}{5} = \frac{6}{5 \times 6} = \frac{6}{30} \\ \frac{2}{5} = \frac{12}{30}$
$\frac{4}{5} = \frac{24}{30} \\ \frac{1}{6} = \frac{5}{30} \\ \frac{5}{6} = \frac{25}{30} \\ \frac{3}{10} = \frac{9}{30}$
$\frac{7}{10} = \frac{21}{10} \\ \frac{9}{10} = \frac{27}{30}$

Answer 2

1/3=10/30; 2/3=20/30; 1/5=6/30; 2/5=12/30; 4/5=24/30; 1/6=5/30; 5/6=25/30; 3/10=9/30; 7/10=21/30; 9/10=27/30. Как-то так...