Question

Упражнения 504,505,508 решите плиз 5 баллов

Answer 1

Ответ:

Пошаговое объяснение:

504.

$\frac{2}{3} *\frac{6}{7} =\frac{4}{7}\\\\\frac{4}{7}*\frac{21}{40}=\frac{3}{10}\\\\\frac{27}{32}*\frac{8}{9}=\frac{3}{4}\\\\\frac{8}{35}*\frac{5}{12}=\frac{2}{21}$

505.

$\frac{7}{9}*6=\frac{14}{3}=\frac{14}{3}=4\frac{2}{3}\\\\4*\frac{3}{20}=\frac{3}{5}\\\\\frac{5}{6} *3=\frac{5}{2} =2\frac{1}{2}\\\\14*\frac{7}{16}=\frac{49}{8}=6\frac{1}{8}\\\\27*\frac{2}{9}=6$

508.

$x:\frac{9}{10} =1\\x=\frac{9}{10}\\\\x:19=\frac{16}{19}\\x=\frac{16*19}{19}=16\\\\x:3=\frac{5}{9}\\x=\frac{5*3}{9}=\frac{5}{3}\\x=1\frac{2}{3}$