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

Toán Lớp 8: 1+2-3-4+5+6-7-8+…+1998-1999-2000+2001

Toán Lớp 8: 1+2-3-4+5+6-7-8+…+1998-1999-2000+2001

Comments ( 2 )

  1. $@Vy$
    Lời giải và giải thích chi tiết:
    1 + 2 – 3 – 4 + 5 + 6 – 7 – 8 +…+ 1998 – 1999 – 2000 + 2001
    = 1 + (2 – 3 – 4 + 5) + (6 – 7 – 8 + 9) +…+ (1998 – 1999 – 2000 + 2001)
    = 1 + 0 + 0 +…+ 0
    =1

  2. $M=1+2-3-4+5+6-7-8+….+1998-1999-2000+2001$
    $M=(1+2-3-4)+(5+6-7-8)+….+(1998-1999-2000+2001)$
    $M=(-4)+(-4)+….+0$
    $M= -8$

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