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

Toán Lớp 5: `21 x 6 x 9/72 x 3 x 6`= `x` là dấu nhân

Toán Lớp 5: 21 x 6 x 9/72 x 3 x 6=
x là dấu nhân

Comments ( 2 )

  1.     21×6×9/72×3×6
    = 21×6×3/24×3×6
    = 3(7×2×1/24×1×2)
    = 3(14×1/24×2)
    = 3×28/24
    = 3×7/6
    = (3×7)/6
    = 21/6
    = 3,5
    = 7/2

  2. 21×6× 9/72 ×3×6
    = 126 ×6× 3/24 ×3×6
    = 3×(42 × 2× 1/24 ×1 ×2)  
    = 3× 7/6
    = 21/6=7/2
    $#Death26$
     

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

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