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

Toán Lớp 4: 3m2 125 dm2= …dm2 A. 4125 B, 405 C, 425 D, 30125

Toán Lớp 4: 3m2 125 dm2= …dm2
A. 4125 B, 405 C, 425 D, 30125

Comments ( 2 )

  1. $ 3m2 125 dm2 = ( 3×100+125)dm2=(300+125)dm2=425dm2 $

  2. 3m2 = 300 dm2  ta lấy 300+125 đc 425
    Giải đáp là C
     

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