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5 m2 8 dm2 = 5 m2 + 8 dm2 = 5m2 + \(\dfrac{8}{100}\)m2 = 5,08 m2
Vậy 5 m2 8 dm2 = 5,08 dm2
![](https://rs.olm.vn/images/avt/0.png?1311)
8dm2=\(\dfrac{8}{100}=0,08m^2\)
\(\Rightarrow5m^28dm^2=5+0,08=5,08dm^2\)
![](https://rs.olm.vn/images/avt/0.png?1311)
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`4m^359dm^3=4,059m^3`
`3m^35dm^3=3,005m^3`
`2m^3=2000dm^3`
`48dm^24cm^2=48,04dm^2`
`5m^28dm^2=5,08m^2`
Vì `1m^3=1000dm^3`
`1m^2=100dm^2,1dm^2=100cm^2`
`4m^3 59dm^3=4,059m^3`
`3m^3 5dm^3=3,005m^3`
`2m^3=2000dm^3`
`48dm^2 4cm^2=48,04dm^2`
`5m^2 8dm^2=5,08m^2`
Vì `1m^3=1000dm^3`
`1m^2=100dm^2,1dm^2=100cm^2`
![](https://rs.olm.vn/images/avt/0.png?1311)
\(2h8dm^2< 280dam^2\)
\(8ha15m^2< 80150m^2\)
\(7\dfrac{1}{2}ha>7ha12dam^2\)
\(9km^25ha=905ha\)
\(7\dfrac{33}{100}ha>6ha3dam^2\)
\(4km^27ha< 4\dfrac{7}{10}km^2\)
![](https://rs.olm.vn/images/avt/0.png?1311)
2,56km=2560m
\(14,6ha=146000m^2\)
3 tấn 123kg=3,123 tấn
3h30'=3,5h
![](https://rs.olm.vn/images/avt/0.png?1311)