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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 5: Hãy giúp mình : 1,25m = …mm 1,2 m2 = …dm2 452m = …km 16,7 ha = … km2

Toán Lớp 5: Hãy giúp mình :
1,25m = …mm 1,2 m2 = …dm2 452m = …km 16,7 ha = … km2

Comments ( 2 )

  1. 1,25m = .1250..mm
    1,2 m2 = ..0.012.dm2
    452m = ..0,452.km
    16,7 ha = .0.167.. km2
     

  2. 1,25m = 1250mm( vì 1m=1000mm)
    1,2 m^2 = 120dm^2 ( vì 1m^2=100dm^2 )
    452m = 0,452km ( 1km = 1000m)
    16,7 ha = 0,167 km^2 ( 1km^2=100ha)
     

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222-9+11+12:2*14+14 = ? ( )