1 Làm theo mẫu:
6,4m=....................................cm
7,6dm=............................cm
52,5dm=............................mm
1005km=..............................m
4,8dam2 =..........m2
,9,05 dam2=........................m2
5,1hm2 =..................=m2
3,4km2=..............................................hm2
3,3kg=......................g
2,22kg=................................g