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

Toán Lớp 6: a) 1/11+2/11+3/11+…+10/11 b) 9.( 262626/272727 . 88888/99999) nhanh nhaats cho ctlhn nhó

Toán Lớp 6: a) 1/11+2/11+3/11+…+10/11
b) 9.( 262626/272727 . 88888/99999)
nhanh nhaats cho ctlhn nhó

Comments ( 2 )

  1. Lời giải và giải thích chi tiết:
    a)1/11+2/11+3/11+…+10/11
    =(1+2+3+…+10)/11
    =((1+9)+(2+8)+(3+7)+(4+6)+(5+10))/11
    =(10+10+10+10+15)/11
    =55/11
    =5
    b)9.(262626/272727 . 88888/99999)
    =9.(26/27 . 8/9)
    =9 . 26/27 . 8/9
    =8 . 26/27
    =208/27

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