1mm = 1/10 cm;               1m= 1/1000  km;            1cm = 1/10 dm;             1dm = 1/10 m

1dam = 10 m;                 1dam= 1/10 hm

Ôn tập về độ dài

1mm= 0,1 cm;               1m= 0,001 km;            1cm= 0,1 dm;           

1dm= 0,1 m                   1dam= 10 m;                 1dam= 0,1 hm

1mm = 1/10 cm ; 1m = 1/1000 km ; 1cm = 1/10 dm 

1dm = 1/10 m ; 1dam = 1/10 hm ; 1km = 10/1 hm 

1mm = 1/10 ; 1m = 1/1000 km ; 1 cm = 1/10 dm

1dm = 1/10 m ; 1dam = 1/10 hm ; 1km = 10/1 hm

mình gửi hơi chậm bạn thông cảm 

a)\(1km=10hm\)

\(1hm=10dam\)

\(1dam=10m\)

\(1km=1000m\)

b)\(1mm=\frac{1}{10}=0,1cm\)

\(1dm=\frac{1}{10}=0,1m\)

\(1cm=\frac{1}{100}=0,01m\)

\(1mm=\frac{1}{1000}=0,001m\)

1km=10hm

1hm=10dam

1dam=10m

1km=1000m

b)1mm= 1/10 cm

1dm=1/10 m

1cm=1/100m

1mm=1/1000 m

1km = 1000m       1m = 1000mm

1hm = 100m          1m = 100cm

1dam = 10m          1m = 10dm

1km = 10hm          1dm = 100mm

1hm = 10dam       1cm = 10mm

1km = 10hm                1mm=0,1cm

1hm=10dam                 1dm = 0,1m

1dam=10m                  1cm= 0,01m

1km=1000m                1mm=0,001m

A) 1km = 10hm

1hm = 10dam

1dam = 10m

1km = 1000m

B) 1mm = 0,1cm

1dm=0,1m

1cm=0,01m

1mm=0,001m

a, 1km =...10....hm        b, 1mm=....0,1...cm

    1hm=...10....dam          1dm=....0,1....m

    1dam=...10....m              1cm=...0,01....m

     1km=...1000.....m              1mm=....0,001...m

a, 1km =....10...hm        b, 1mm=...0,1....cm

    1hm=...10....dam          1dm=..0,1......m

    1dam=.....10..m              1cm=..0,01.....m

     1km=......1000..m              1mm=..0,001.....m

1hm = 100m           1m = 100cm

1hm = 100dam       1m = 10dm

1dam = 10m           1dm = 10cm

1km = 1000m         1cm = 10mm