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

Toán Lớp 6: (1/2+1).(1/3+1).(1/4+1)-(1/2017+1).(1/2018+1)

Toán Lớp 6: (1/2+1).(1/3+1).(1/4+1)….(1/2017+1).(1/2018+1)

Comments ( 2 )

  1. Đáp án:
     
    Giải thích các bước giải:
     

    toan-lop-6-1-2-1-1-3-1-1-4-1-1-2017-1-1-2018-1

  2. (1/2+1).(1/3+1).(1/4+1)….(1/2017+1).(1/2018+1)
    =3/2 . 4/3 . 5/4 . … .2018/2017. 2019/2018 
    = 1/2 . 2019 = 2019/2 

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