12dam2 30 m2 = 12,3...dam2
2)5km2 155dam2 = .5,0155..km2
3)8m2  7dm2 = .8,07..m2
54)78dm2 5cm2 = 78,05...dm2
6)6m2 5cm2= ..6,0005.m2
7)45,6 dam2 = 4560...m2
8)4,05hm2 = .40500..m2
9)9,1km2 = .9100000..m2
10)5,05km2 = .505..hm2