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

Toán Lớp 5: Tính nhanh: A=2011×2013+2012/2012×2013-1

Toán Lớp 5: Tính nhanh: A=2011×2013+2012/2012×2013-1

Comments ( 2 )

  1. Giải đáp:
    A=(2011×2013+2012)/(2012×2013-1)
    A=(2011×2013+2012)/((2011+1)×2013-1)
    A=(2011×2013+2012)/(2011×2013+ 1 ×2013 -1)
    A=(2011×2013+2012)/(2011×2013+2013 -1)
    A=(2011×2013+2012)/(2011×2013+2012)
    A = 1

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