Lời giải:
$=65\times 8^2:(4^3\times 2^5)=65\times (2^3)^2:[(2^2)^3\times 2^5]$
$=65\times 2^6:(2^6\times 2^5)=65:2^5=\frac{65}{32}$
\(16.65.8^2:\left(4^3.2^5.16\right)=2^4.65.2^6:\left(2^6.2^5.2^4\right)\)
\(=\dfrac{65}{2^5}=\dfrac{65}{32}\)
\(16\times65\times8^2:\left(4^3\times2^5\times16\right)\)
\(=16\times65\times8^2:\left(4^5\times2^5\right)\)
\(=2^4\times65\times2^6:2^{15}\)
\(=65:2^{10}:2^{15}\)
\(=65:2^5\)
\(=\dfrac{65}{32}\)