a)

Godzina to 60 minut.

Kwadrans to 15 minut.

 

$\frac{3}{\sout{5}{}_1}\cdot \sout{60}{}^{12}=3\cdot 12=36\text{min.}$   

 

$\frac{2}{3{}_1}\cdot \sout{15}{}^5=2\cdot 5=10\text{min.}$   

 

$\frac{17}{\sout{30}{}_1}\cdot \sout{60}{}^2=17\cdot 2=34\text{min.}$  

 

$2\frac{1}{5}\cdot 15=\frac{11}{\sout{5}{}_1}\cdot \sout{15}{}^3=11\cdot 3=33\text{min.}$  

 

$1\frac{7}{12}\cdot 60=\frac{19}{\sout{12}{}_1}\cdot \sout{60}{}^5=19\cdot 5=95\text{min.}$  

 

 

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b)

1 dm = 10 cm

1 m = 100 cm

 

  $\frac{2}{\sout{5}{}_1}\cdot \sout{10}{}^2=2\cdot 2=4\text{cm}$  

 

$\frac{3}{\sout{4}{}_1}\cdot \sout{100}{}^{25}=3\cdot 25=75\text{cm}$  

 

$2\frac{7}{10}\cdot 10=\frac{27}{\sout{10}{}_1}\cdot \sout{10}{}^1=\frac{27}{1}\cdot 1=27\text{cm}$  

 

$\frac{19}{\sout{20}{}_1}\cdot \sout{100}{}^5=19\cdot 5=95\text{cm}$  

 

$2\frac{3}{50}\cdot 100=\frac{103}{\sout{50}{}_1}\cdot \sout{100}{}^2=103\cdot 2=206\text{cm}$  

 

 

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c)         

Tydzień to 7 dni.

$\frac{2}{\sout{7}{}_1}\cdot \sout{7}{}^1=2\text{dni}$   

 

Kwiecień ma 30 dni.

$\frac{2}{\sout{3}{}_1}\cdot \sout{30}{}^{10}=2\cdot 10=20\text{dni}$   

 

Rok przestępny ma 366 dni.

$\frac{1}{\sout{3}{}_1}\cdot \sout{366}{}^{122}=122\text{dni}$  

 

Czerwiec ma 30 dni.

$\frac{3}{\sout{10}{}_1}\cdot \sout{30}{}^3=3\cdot 3=9$  

 

$3\frac{3}{7}\cdot 7=\frac{24}{\sout{7}{}_1}\cdot \sout{7}{}^1=24\cdot 1=24\text{dni}$  

 

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d)

1 kg = 100 dag

1 t = 1000 kg = 100 000 dag

   

$\frac{9}{\sout{10}{}_1}\cdot \sout{100}{}^{10}=9\cdot 100=90\text{dag}$  

 

$1\frac{1}{4}\cdot 100=\frac{5}{\sout{4}{}_1}\cdot \sout{100}{}^{25}=5\cdot 25=125\text{dag}$   

 

$\frac{8}{\sout{25}{}_1}\cdot \sout{100}{}^4=8\cdot 4=32\text{dag}$  

 

$\frac{1}{\sout{100}{}_1}\cdot \sout{100000}{}^{1000}=1000\text{dag}$  

 

$5\frac{3}{20}\cdot 100=\frac{103}{\sout{20}{}_1}\cdot \sout{100}{}^5=103\cdot 5=515\text{dag}$