4/7 •16/2 дробная черта (4/2)/4

[latex] \frac{ \frac{4}{7}* \frac{16}{2}}{ \frac{4}{2}/4} = \frac{ \frac{4}{7}* 8}{ 2/4} = \frac{ \frac{4}{7}* 8}{ 1/2} =4/7*8:1/2=4/7*8*2/1=4/7*8*2=\\ =64/7=9 \frac{1}{7} [/latex]