`1km^2=100ha`

`1m^2=0,0001ha`

`a`

   `4km^2` `24m^2 =...... ha` 

   `4km^=400ha`

   `24m^2=0,0024ha`

   `400ha` `0,0024ha=400,0024ha`

`b`

   `1km^2=......ha`

   `1km^2=100ha`

`c`

   `0,19km^2=...m^2`

   `0,19km^2=190000m^2`

`d`

   `26ha` `23m^2=...m^2`

   `26ha=260000m^2`

   `260000m^2` `23m^2=260023m^2`

`e`

   `0,2564ha = ......... m^2`

   `0,2564ha=2564m^2`

`f`

   `5 600 000cm^2 = ...... ha`

   `5 600 000cm^2=0,056ha`

`g`

   `61 m^2= ........... ha`

   `62m^2=0,0061ha`

`h`

   `1ha` `124cm^2=........cm^2`

   `1ha=100000000cm^2`

   `100000000cm^2` `124cm^2=100000124cm^2`

`i`

   `364m^2` `789mm^2=....cm^2`

   `364m^2=3640000cm^2`

   `789mm^2=7,89cm^2`

   `3640000cm^2` `7,89cm^2=3640007,89cm^2`

`j`

   `201ha` `345m^2=....dm^2`

   `201ha=201000000dm^2`

   `345m^2=34500dm^2`

   `201000000dm^2` `34500dm^2=2044500dm^2`