a) 2015m2=.....0,2015........ha
7000m2=.....0,7........ha
1ha=.......0,01......km2
21ha=.....0,21........km2
b) Viết số thích hợp:
3,61m2=......0,000361.......ha
54,3m2=......54.....m2.......30......dm2
9,5 km2=......950.......ha
6,4391ha=......64391.......m2
a.+0,2015ha
+0,7ha
+0,01km2
+0,21km2
b.+0,0361ha
+54m230dm2
+9km250ha
+