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

Toán Lớp 6: 11/12+11/12.23+–.+11/89.100

Toán Lớp 6: 11/12+11/12.23+………+11/89.100

Comments ( 2 )

  1. @kem
    Lời giải và giải thích chi tiết:
    11/12+11/(12.23)+………+11/(89.100)
    = 11/12 + 11/12 – 11/23 + 11/23 – ……….. – 11/89+ 11/89 – 11/100
    = 1 – 1/12 + 1/12 – 1/23 + 1/23 – ………. – 1/89 + 1/89 – 1/100
    = 1 – 1/100
    = 99/100

  2. Giải đáp:
    11/12 + 11/(12 . 23) + ……… + 11/(89 . 100)
    = 11/(1 . 12) + 11/(12 . 23) + …………. + 11/(89 . 100)
    = 1 – 1/12 + 1/12 – 1/23 + ………. + 1/89 – 1/100
    = 1 – (1/12 – 1/12) – (1/23 – 1/23) -…………… – (1/89 – 1/89) – 1/100
    = 1 – 1/100
    = 99/100 
     

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

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