a)   w kwadracie:

$1:\frac{1}{4}=4$  

w połowie kwadratu:

$\frac{1}{2}:\frac{1}{4}=2$  

w $1\frac{1}{4}$  kwadratu:

$1\frac{1}{4}:\frac{1}{4}=5$  

w $2\frac{3}{4}$  kwadratu:

$2\frac{3}{4}:\frac{1}{4}=11$  

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b)    $1\cdot \frac{4}{1}=4$  

$\frac{1}{2}\cdot \frac{4}{1}=\frac{4}{2}=2$  

$\frac{5}{4}\cdot \frac{4}{1}=\frac{5\cdot {\sout{4}}^1}{{\sout{4}}_1\cdot 1}=5$  

$\frac{11}{4}\cdot \frac{4}{1}=\frac{11\cdot {\sout{4}}^1}{{\sout{4}}_1\cdot 1}=11$