问一道数学题超难······简便计算1.(2005+2006+2007+2008+2009+2010+2011)÷20082.20092009×2008与20082008×2009的结果相差多少?3.9999×2222+3333×3334注意,一定要简便计算.

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问一道数学题超难······简便计算1.(2005+2006+2007+2008+2009+2010+2011)÷20082.20092009×2008与20082008×2009的结果相差多少?3.

问一道数学题超难······简便计算1.(2005+2006+2007+2008+2009+2010+2011)÷20082.20092009×2008与20082008×2009的结果相差多少?3.9999×2222+3333×3334注意,一定要简便计算.
问一道数学题超难······简便计算
1.(2005+2006+2007+2008+2009+2010+2011)÷2008
2.20092009×2008与20082008×2009的结果相差多少?
3.9999×2222+3333×3334
注意,一定要简便计算.

问一道数学题超难······简便计算1.(2005+2006+2007+2008+2009+2010+2011)÷20082.20092009×2008与20082008×2009的结果相差多少?3.9999×2222+3333×3334注意,一定要简便计算.
(2005+2006+2007+2008+2009+2010+2011)÷2008
=(2008-3+2008-2+2008-1+2008+2008+1+2008+2+2008+3)÷2008
=2008×7÷2008
=7
20092009×2008-20082008×2009
=10001×2009×2008-10001×2008×2009
=0
9999×2222+3333×3334
=3333×3×2222+3333×3334
=3333×(6666+3334)
=3333×10000
=33330000

1.(2005+2006+2007+2008+2009+2010+2011)÷2008
=[(2005+2011)+(2006+2010)+(2007+2009)+2008]÷2008
=2+2+2+1
=7
2. 20092009×2008-20082008×2009
=1001×2009×2008-1001×2008×2009

全部展开

1.(2005+2006+2007+2008+2009+2010+2011)÷2008
=[(2005+2011)+(2006+2010)+(2007+2009)+2008]÷2008
=2+2+2+1
=7
2. 20092009×2008-20082008×2009
=1001×2009×2008-1001×2008×2009
=0
3. 9999×2222+3333×3334
=3333×3×2222+3333×3334
=3333×(3×2222+3334)
=3333×(6666+3334)
=3333×10000
=33330000

收起

1, 7+(-3-2-1+0+1+2+3)/2008=7
2,20092009*2008-20082008*2008-20082008
=10001*2008-20082008=0
3,3333*6666+3333*3334=3333*10000=33330000

1.原式=7*2008+(-3-2-1+1+2+3)/2008
=7
2.原式=2008*2009*10001-2008*10001*2009=0
3.原式=3333*3*2222+3333*3334
=3333*(6666+3334)
=33330000

1,
=7*2008÷2008=7
2,
1001*2009*2008与1001*2008*2009结果一样
3,
=3333*6666+3333*3334
=3333*(6666+3334)
=33330000