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

Toán Lớp 6: Tính nhanh: 28.75+28.15+90.72

Toán Lớp 6: Tính nhanh:
28.75+28.15+90.72

Comments ( 2 )

  1. Giải đáp:
    28.75+28.15+90.72
    =28.(75+15)+90.72
    =28.90+90.72
    =90.(28+72)
    =90.100
    =9000
     

  2. 28 × 75 + 28 × 15 + 90 × 72
    = 28 × ( 75 + 15 ) + 90 × 72
    = 28 × 90 + 90 × 72
    = 90 × ( 28 + 72 )
    = 90 × 100
    = 9000
    @ Rin gửi

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