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

Toán Lớp 6: 1+(-2)+-3)+4+5+(-6)+(-7)+9+-+1997+(-1998)+(-1999)+2000

Toán Lớp 6: 1+(-2)+-3)+4+5+(-6)+(-7)+9+….+1997+(-1998)+(-1999)+2000

Comments ( 2 )

  1. 1+(-2)+(-3)+4+5+(-6)+(-7)+9+….+1997+(-1998)+(-1999)+2000
    theo bài ra ta có:
    1+(-2)+(-3)+4+5+(-6)+(-7)+9+….+1997+(-1998)+(-1999)+2000
    =1-2-3+4+…………+1997-1997-1999+2000
    = (1-2-3+4)+…………+(1997-1997-1999+2000)
    =0 + 0 + 0 +………….0
    =0
     

  2. 1+(-2)+(-3)+4+5+(-6)+(-7)+9+….+1997+(-1998)+(-1999)+2000
    =1-2-3+4+…….+1997-1997-1999+2000
    = (1-2-3+4)+……..+(1997-1997-1999+2000)
    =0 + 0 + 0 +……+0
    =0
     

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

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