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

Toán Lớp 5: d 2011 x 2013 – 1 / 2010 + 2011 x 2012

Toán Lớp 5: d 2011 x 2013 – 1 / 2010 + 2011 x 2012

Comments ( 2 )

  1. (2011 xx 2013 – 1) / (2010 + 2011 xx 2012)
      2011 xx 2013 – 1
     = 2011 xx ( 2012 +1) -1
    = 2011 xx 2012 x 2011 – 1
    = 2011 xx 2012 x 2010
    => (2011 xx 2013 – 1) / (2010 + 2011 xx 2012)
    = (2011 xx 2012 xx 2010) / (2010 + 2011 xx 2012)
    = 1

  2. Giải đáp:
     
    Lời giải và giải thích chi tiết:
    2011×2013-12010+2011×2012
      2011×2013-1
     =2011×(2012+1)-1
    =2011×2012×2011-1
    =2011×2012×2010
    ⇒2011×2013-12010+2011×2012
    =2011×2012×20102010+2011×2012
     

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

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