Giải thích các bước giải:

a.$\text{4 km}^2 \text{ 24 m}^2=\text{400,0024 ha}$ 

f.$\text{5 600 000 cm}^2 =\text{0,056 ha}$

b.$\text{1 km}^2 =\text{ 100 ha}$

g.$\text{61 m}^2=\text{ 0,0061 ha}$

c.$\text{0,19 km}^2=\text{190 000 m}^2$

h.$\text{1 ha 124 cm}^2=\text{ 100 000 124 cm}^2$

d.$\text{26 ha 23 m}^2 =\text{260 023 m}^2$

i.$\text{364 m}^2\text{ 789 mm}^2 =\text{3 640 007, 89 cm}^2$

e.$\text{0,2564 ha = 2564 m}^2$

j.$\text{201 ha 345 m}^2 =\text{201 034 500 dm}^2$