Question

Выполните действия :А. 4 2/3 *1 2/7 Б. 5/8*4/5.В.9/25 *2 1/7 *1 5/9

Answer 1

А:
$4 \frac{2}{3} \times 1 \frac{2}{7} = \frac{14}{3} \times \frac{9}{7} = \frac{126}{21} = 6$
Б:
$\frac{5}{8} \times \frac{4}{5} = \frac{20}{40} = \frac{1}{2}$
В:
$\frac{9}{25} \times 2 \frac{1}{7} \times 1 \frac{5}{9} =\frac{9}{25} \times \frac{15}{7} =\frac{135}{75} =$
$= \frac{27}{35} \\ \\ \frac{27}{35} \times 1\frac{5}{9} = \frac{27}{35} \times \frac{14}{9} = \frac{378}{315} =$
$= 1 \frac{1}{5}$