Question

помогите с заданием, очень нужно​

Answer 1

$\frac{8:2\frac{2}{5}}{5\frac{1}{4}:7}:\frac{2\frac{1}{7}:\frac{5}{7} }{4:\frac{8}{9} }=6\frac{2}{3}$

1)     $8:2\frac{2}{5}=8:\frac{12}{5}=\frac{8*5}{12}=\frac{10}{3};$

2)    $5\frac{1}{4}:7=\frac{21}{4}*\frac{1}{7} =\frac{21*1}{4*7}=\frac{3}{4}$

3)    $\frac{10}{3}:\frac{3}{4}= \frac{10}{3}*\frac{4}{3}= \frac{10*4}{3*3}=\frac{40}{9};$  

4)    $2\frac{1}{7}: \frac{5}{7}=\frac{15}{7}*\frac{7}{5} =3$

5)    $4:\frac{8}{9}= 4*\frac{9}{8}=\frac{4*9}{8}=\frac{9}{2}$

6)    $3:\frac{9}{2}=\frac{3*2}{9}=\frac{6}{9}$

7)    $\frac{40}{9}:\frac{6}{9}=\frac{40}{9}*\frac{9}{6} = \frac{40}{ 6 }= \frac{20}{3}= 6\frac{2}{3}$