$\text{a)}$

$0,16\cdot 10=1,6$

$0,018\cdot 100=1,8$

$14,2\cdot 100=1420$

$3,36\cdot 1000=3360$

 

$\text{b)}$

$23,4:10=2,34$

$3,14:100=0,0314$

$9:1000=0,009$

$0,17:100=0,0017$

 

$\text{c)}$

$\frac{32,3}{10}$   $=32,3:10=3,23$

$\frac{65,4}{100}$ $=65,4:100=0,654$

$\frac{1,11}{100}$ $=1,11:100=0,0111$

$\frac{5,3}{1000}$   $=5,3:1000=0,0053$