Hùng cao 142cm, Tuấn cao 136cm. Hỏi Hùng cao hơn Tuấn bao nhiêu Xăng-ti-mét?

Số ?

5dam = ......m             2m = ......dm

7hm = ......m               4m = ......cm

3hm = ......m               6cm = ......mm

6dam = ......m             8dm = ......cm

Tính (theo mẫu):

Mẫu 26m x 2 = 52m               69cm : 3 = .....cm

      25dam x 2 = .....dam         48m : 4 = .....m

      18hm x 4 = .....hm             84dm : 2 = .....dm

      82km x 5 = .....km           66mm : 6 = .....mm

Số ?

1km = .....m         1m = .....mm

1hm = .....m         1m = .....cm

1dam = .....m       1m = .....dm

1km = .....hm       1dm = .....mm

1hm = .....dam     1cm = .....mm