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

Toán Lớp 6: Tính 1/1.2+1/2.3+ …+1/99.100

Toán Lớp 6: Tính 1/1.2+1/2.3+ …+1/99.100

Comments ( 2 )

  1. 1/(1.2) + 1/(2.3) + … +1/(99.100)
    = 1/1 – 1/2 + 1/2 – 1/3 + … + 1/99 – 1/100
    = 1/1 – 1/100
    = 100/100 – 1/100
    = 99/100
     

  2. Giải đáp:
    $\frac{1}{1.2}$+ $\frac{1}{2.3}$+…+ $\frac{1}{99.100}$
    =1-$\frac{1}{2}$ +$\frac{1}{2}$- $\frac{1}{3}$ +…+$\frac{1}{99}$- $\frac{1}{100}$
    =1-$\frac{1}{100}$
    =$\frac{99}{100}$ 
    Chúc hk tốt:))
     

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

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