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Viết các số đo sau dưới dạng số đo có đơn vị là ha: 72780m2 =............. 0,3km2=............ 4015m2=.............. 20,68dam2=.............. 1403dam2=............... 10,08m2=.............. dấu lớn bé bằng 2m2 5dm2........2,5m2 4km2 5m2.......4,00005km2 5m2 3dm2.........5,03m2 2hm2 15 dam2...2,05hm2 3m2 375cm2............3,4m2 44000m2 5dm2...4,5ha
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