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

Toán Lớp 7: Tính A=(1/10-1)×(1/11-1)×(1/12 – 1)…(1/99-1)× (1/100 – 1)

Toán Lớp 7: Tính
A=(1/10-1)×(1/11-1)×(1/12 – 1)…(1/99-1)× (1/100 – 1)

Comments ( 2 )

  1. A = (1/10 – 1)(1/11 – 1)(1/12 – 1) … (1/99 – 1)(1/100 – 1)
    A = -9/10 . -10/11 . -11/12 … -98/99 . -99/100
    A = (9.10.11…98)/(10.11.12…99) . -99/100
    A = 9/99 . -99/100
    A = -9/100
     

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

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