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

Toán Lớp 7: 1 – 1/2 + 2 – 2/3 + 3 – 3/4 + 4 – 1/4 – 3 – 1/3 – 2 – 1/2 – 1

Toán Lớp 7: 1 – 1/2 + 2 – 2/3 + 3 – 3/4 + 4 – 1/4 – 3 – 1/3 – 2 – 1/2 – 1

Comments ( 2 )

  1. 1-1/2+2-2/3+3-3/4+4-1/4-3-1/3-2-1/2-1
     = (1-1) +( -1/2-1/2) +(2-2)+(-2/3-1/3)+(3-3)+(-3/4-1/4)
    = 0 -1 +0-1+0-1+4
    =-3+4
    =1

  2. Giải đáp: =4
     
    Lời giải và giải thích chi tiết:
     1-$\dfrac{1}{2}$+2-$\dfrac{2}{3}$+3-$\dfrac{3}{4}$+4-$\dfrac{1}{4}$-3-$\dfrac{1}{3}$-2-$\dfrac{1}{2}$-1
    =(1-1)+(-$\dfrac{1}{2}$-$\dfrac{1}{2}$)+(2-2)+(-$\dfrac{2}{3}$-$\dfrac{1}{3}$)+(3-3)+(-$\dfrac{3}{4}$-$\dfrac{1}{4}$)+4
    =4
    xin tlhn để cày đoàn nha, mơn nhìu

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

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