Сократите:
1) $\frac{12 * 21}{35 * 15}$;
2) $\frac{72 * 11}{33 * 30}$;
3) $\frac{25 * 17 * 44}{51 * 8 * 75}$;
4) $\frac{8 * 3 + 8 * 23}{3 * 16}$;
5) $\frac{17 * 48}{17 * 16 - 9 * 16}$;
6) $\frac{14 * 5 - 14 * 3}{21 * 9 + 21 * 3}$.

Получай решения и ответы с помощью нашего бота

Решение

reshalka.com

Математика 6 класс Мерзляк. Номер №226

Решение 1

$\frac{12 * 21}{35 * 15} = \frac{\overset{4}{\cancel{12}} * \overset{3}{\cancel{21}}}{\underset{5}{\cancel{35}} * \underset{5}{\cancel{15}}} = \frac{12}{25}$

Решение 2

$\frac{72 * 11}{33 * 30} = \frac{\overset{12}{\cancel{72}} * \overset{1}{\cancel{11}}}{\underset{3}{\cancel{33}} * \underset{5}{\cancel{30}}} = \frac{12}{15} = \frac{4}{5}$

Решение 3

$\frac{25 * 17 * 44}{51 * 8 * 75} = \frac{\overset{1}{\cancel{25}} * \overset{1}{\cancel{17}} * \overset{11}{\cancel{44}}}{\underset{3}{\cancel{51}} * \underset{2}{\cancel{8}} * \underset{3}{\cancel{75}}}$

Решение 4

$\frac{8 * 3 + 8 * 23}{3 * 16} = \frac{8 * (3 + 23)}{3 * 16} = \frac{\overset{1}{\cancel{8}} * \overset{13}{\cancel{26}}}{3 * \underset{1}{\cancel{16}}} = \frac{13}{3} = 4\frac{1}{3}$

Решение 5

$\frac{17 * 48}{17 * 16 - 9 * 16} = \frac{17 * 48}{16 * (17 - 9)} = \frac{17 * \overset{3}{\cancel{48}}}{\underset{1}{\cancel{16}} * 8} = \frac{51}{8} = 6\frac{3}{8}$

Решение 6

$\frac{14 * 5 - 14 * 3}{21 * 9 + 21 * 3} = \frac{14 * (5 - 3)}{21 * (9 + 3)} = \frac{\overset{1}{\cancel{14}} * \overset{1}{\cancel{2}}}{\underset{3}{\cancel{21}} * \underset{3}{\cancel{12}}} = \frac{1}{9}$