1 ha = 10 000 m2 1 a = 100 m2 1 ha = 100 a

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a)

Podane wielkości wyrażamy w arach i metrach kwadratowych. 

$2\text{ha}=200\text{a}=20000{\text{m}}^2$  

$7\text{ha}=700\text{a}=70000{\text{m}}^2$  

$5000\text{ha}=500000\text{a}=50000000{\text{m}}^2$  

$0,7\text{ha}=70\text{a}=7000{\text{m}}^2$  

$0,05\text{ha}=5\text{a}=500{\text{m}}^2$  

$3\frac{1}{4}\text{ha}=3,25\text{ha}=325\text{a}=32500{\text{m}}^2$  

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b)

Podane wielkości zapisujemy w hektarach i arach. 

$80000{\text{m}}^2=8\text{ha}=800\text{a}$  

$700{\text{tys. m}}^2=700000{\text{m}}^2=70\text{ha}=7000\text{a}$  

$6000{\text{m}}^2=0,6\text{ha}=60\text{a}$  

$500{\text{m}}^2=0,05\text{ha}=5\text{a}$  

$6{\text{mln m}}^2=6000000{\text{m}}^2=600\text{ha}=60000\text{a}$