A. [tex]\frac{2*3*4*5}{7*8*9*10}:\frac{1}{42}= \frac{2}{7*12}:\frac{1}{42}= \frac{1}{42}:\frac{1}{42}= 1[/tex]
B. [tex]0,2:0,(2)*11,(1)= \\ \\ 0,2= 0\frac{2}{10}= \frac{1}{5} \\ 0,(2)= 0\frac{2}{9}= \frac{2}{9} \\ 11,(1)=11\frac{1}{9}=\frac{100}{9} \\ \\ \frac{1}{5} :\frac{2}{9}*\frac{100}{9}= \\ \frac{9}{45}*\frac{45}{10}*\frac{100}{9}= \\ \frac{9}{10}*\frac{100}{9}=10[/tex]
\\weskizq
