an co 8000 dong hoa mua 2 quyen vo gia moi quyen vo la 1500 dong hoi an con lai bao nhieu tien?
bai 5:
3dm 4cm....cm
5m 90cm....cm
6m 5dm.....cm
9m.....cm
7m 40cm...cm
4m 6cm.....cm
50dm....m
400cm....m
bai 6:
3dm 4cm +40cm=
5m 90cm-43cm=
6m 5dm-50cm=
9m-500cm=
7m 40cm-740cm=
4m 6cm-46cm=
5dm 9cm-56cm=
400cm-40cm=