$a\text{)}1\text{m}=10\text{dm}$  

zatem:

$1\text{m}={10}^1\text{dm}$  

więc:

$n=1$  

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$b\text{)}1\text{dm}=0,1\text{m}$  

zatem:

$1\text{dm}={10}^{-1}\text{m}$  

więc:

$n=-1$  

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$c\text{)}1\text{km}=1000\text{m}$  

zatem:

$1\text{km}={10}^3\text{m}$  

więc:

$n=3$  

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$d\text{)}1\text{m}=0,001\text{km}$  

zatem:

$1\text{m}={10}^{-3}\text{km}$  

więc:

$n=-3$  

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$e\text{)}1\text{km}=1000000\text{mm}$  

zatem:

$1\text{km}={10}^6\text{mm}$  

więc:

$n=6$  

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$f\text{)}1\text{mm}=0,000001\text{km}$  

zatem:

$1\text{mm}={10}^{-6}\text{km}$  

więc:

$n=-6$