Ta có`:1km^2=1000000m^2`

         `1ha=10000m^2`

Do đó`:``0,058km^2 =0,058xx1000000=58000 m^2`

             `5,85ha =5,85xx10000=58500m^2`

Vậy `0,058km^2 =58000 m^2`

       `5,85ha =58500m^2`