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

Toán Lớp 5: a) 2,5km2 = ………. m2 b) 10,4 ha = ……….m2 c) 0,03ha = ………..m2 d) 800dm2 = ……… m2

Toán Lớp 5: a) 2,5km2 = ………. m2 b) 10,4 ha = ……….m2 c) 0,03ha = ………..m2
d) 800dm2 = ……… m2 e) 80dm2 = ……….m2 g) 917dm2 = ………m2

Comments ( 2 )

  1. a) 2,5km2 = 25000000 m2
    vì 1 km2 = 1000000 m2
    b) 10,4 ha = 1040000 m2
    vì 1 ha = 10 000 m2
    c) 0,03ha = 3000 m2
    vì 0 , 0 1 ha = 1000 m2
    d) 800dm2 = 8 m2
    vì 1 m2 = 100 dm2
    e) 80dm2 = 0 , 80 m2
    vì 1 dm2 = 0,01 m2
    g) 917dm2 = 9 , 17 m2
    vì 1 m2 = 100 m2
     

  2. a ) 2,5km^2 = 2500000m^2
    b ) 10,4ha = 104000m^2
    c ) 0,03ha = 300m^2
    d ) 800dm^2 = 8m^2
    e ) 80dm^2 = 0,8m^2
    g ) 917dm^2 = 9,17m^2
    1km^2 = 1000000m^2
    1ha = 10000m^2
    1m^2 = 100dm^2
    => 100dm^2 = 1m^2
    1m^2 = 100dm^2
    => 10dm^2 = 0,1m^2
    #dtkc
     

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

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