$a){\sout{0,6}}^{0,1}\cdot \frac{5}{{\sout{12}}^2}=\frac{0,5}{2}=0,5:2=0,25$

$b)\frac{4}{{\sout{7}}^1}\cdot {\sout{0,28}}^{0,04}=0,16$

$c){\sout{0,8}}^{0,1}\cdot \frac{5}{{\sout{16}}^2}=\frac{0,5}{2}=0,25$

$d)0,21\cdot 2\frac{2}{7}={\sout{0,21}}^{0,03}\cdot \frac{16}{{\sout{7}}^1}=0,48$

$e)4\frac{2}{3}\cdot 0,0006=\frac{14}{{\sout{3}}^1}\cdot {\sout{0,0006}}^{0,0002}=0,0028$

$f)1\frac{2}{3}\cdot 0,12=\frac{5}{{\sout{3}}^1}\cdot {\sout{0,12}}^{0,04}=0,2$

$g)5\frac{3}{5}\cdot 1,5=\frac{28}{{\sout{5}}^1}\cdot {\sout{1,5}}^{0,3}=8,4$

$h)8,75\cdot 4\frac{6}{7}=8\frac{3}{4}\cdot 4\frac{6}{7}=\frac{{\sout{35}}^5}{4}\cdot \frac{34}{{\sout{7}}^1}=\frac{170}{4}=\frac{85}{2}=42\frac{1}{2}$

$i)4\frac{3}{8}\cdot 1,6=\frac{35}{8}\cdot 1\frac{6}{10}=\frac{{\sout{35}}^7}{{\sout{8}}^1}\cdot \frac{{\sout{16}}^1}{{\sout{10}}^1}=7$