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

Toán Lớp 6: -13- 14- 15- 16- …- 2019- 2020

Toán Lớp 6: -13- 14- 15- 16- …- 2019- 2020

Comments ( 2 )

  1. Lời giải chi tiết:
    -13- 14- 15- 16- …- 2019- 2020
    =-(13+14+15+16+…+2019+2020)
    =-{(2020+13).[(2020-13):1+1]:2}
    =-(2033.2008:2)
    =-(2033.1004)
    =-2041132

  2. -13 – 14 – 15 – 16 – … – 2019 – 2020
    = -( 13 + 14 + 15 + 16 + … + 2019 + 2020 )
    = -{ ( 13 + 2020 ). [ ( 2020 – 13 ) + 1 ] : 2 }
    = -{ 2033. 2008 : 2 }
    = -2 041 132

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