Zapiszmy podane wielkości za pomocą ułamków dziesiętnych.

a)

$7\frac{1}{4}\text{cm}\stackrel{\cdot 25}{=}7\frac{25}{100}\text{cm}=7,25\text{cm}$

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b)

$\frac{1}{8}\text{t}\stackrel{\cdot 125}{=}\frac{125}{1000}\text{t}=0,125\text{t}$

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c)

$1\frac{7}{25}\text{m}\stackrel{\cdot 4}{=}1\frac{28}{100}\text{m}=1,28\text{m}$

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d)

$2\frac{3}{4}\text{l}\stackrel{\cdot 25}{=}2\frac{75}{100}\text{l}=2,75\text{l}$

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e)

$\frac{16}{200}\text{kg}\stackrel{\cdot 5}{=}\frac{80}{1000}\text{kg}=0,080\text{kg}$

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f)

$8\frac{72}{4000}\text{km}\stackrel{:4}{=}8\frac{18}{1000}\text{km}=8,018\text{km}$