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

Toán Lớp 5: 87,09 x 0,75 + 87,09 : 4 – 87,09 =?

Toán Lớp 5: 87,09 x 0,75 + 87,09 : 4 – 87,09 =?

Comments ( 2 )

  1. bài làm
    87,09 x 0,75 + 87,09 : 4 – 87,09 
    = 65,3175 + 21,7725 – 87,09
    =87,09 – 87,09
    =0
     

  2. 87,09 × 0,75 + 87,09 : 4 – 87,09
    = 87,09 × 0,75 + 87,09 × 1/4 + 87/09 × ( – 1 )
    = 87,09 × ( 0,75 + 1/4 – 1 )
    = 87,09 × ( 0,75 – 0,75 )
    = 87,09 × 0
    = 0

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

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