a) Zamieniamy na ary:

$0,02\text{ha}=0,02\cdot 100\text{a}=2\text{a}$

$3200{\text{m}}^2=3200\cdot 0,01\text{a}=32\text{a}$

$0,5{\text{km}}^2=0,5\cdot 1000\text{m}\cdot 1000\text{m}=500000{\text{m}}^2=500000\cdot 0,01\text{a}=5000\text{a}$

 

b) Zamieniamy na hektary:

$320000{\text{m}}^2=320000\cdot 0,0001\text{ha}=32\text{ha}$

$800\text{a}=800\cdot 0,01\text{ha}=8\text{ha}$

$0,7{\text{km}}^2=0,7\cdot 1000\text{m}\cdot 1000\text{m}=700000{\text{m}}^2=700000\cdot 0,0001\text{ha}=70\text{ha}$

 

 c) Zamieniamy na metry kwadratowe:

$250\text{a}=250\cdot 100{\text{m}}^2=25000{\text{m}}^2$

$0,4\text{ha}=0,4\cdot 10000{\text{m}}^2=4000{\text{m}}^2$

$\frac{1}{4}\text{a}=\frac{1}{4}\cdot 100{\text{m}}^2=25{\text{m}}^2$

$2,7\text{ha}=2,7\cdot 10000{\text{m}}^2=27000{\text{m}}^2$

 

 d) Zamieniamy na kilometry kwadratowe:

$150\text{ha}=150\cdot 10000{\text{m}}^2=1500000{\text{m}}^2=1500000\cdot 0,001\text{km}\cdot 0,001\text{km}=1,5{\text{km}}^2$

$1000000\text{a}=1000000\cdot 100{\text{m}}^2=100000000{\text{m}}^2=100000000\cdot 0,001\text{km}\cdot 0,001\text{km}=100{\text{km}}^2$

$45\text{ha}=45\cdot 10000{\text{m}}^2=450000{\text{m}}^2=450000\cdot 0,001\text{km}\cdot 0,001\text{km}=0,45{\text{km}}^2$