[tex]A) \\\\1: ( 6,4*2\frac{1}{2}) =1: (\frac{ 64}{10}* \frac{5}{2}) =1: (\frac{ \not{32}^{16}}{\not{5}^1}* \frac{\not{5}^1}{\not{2}^1}) =1:16=\frac{1 }{16}\\\\\\B)\\\\9 \frac{2}{3}*0,6 : 34,8= \frac{29}{3}* \frac{6 }{10}: \frac{348}{10}= \frac{\not{29}^1}{\not{3}^1}* \frac{\not{6}^2 }{\not{10}^1}*\frac{\not{10}^1}{\not{5}^{12}}=\frac{2}{12}=\frac{1}{6}[/tex]
