(1+3+5+7+.+99+101)-(2+4+6+8+.+98+100)这题怎么做,
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![(1+3+5+7+.+99+101)-(2+4+6+8+.+98+100)这题怎么做,](/uploads/image/z/209898-18-8.jpg?t=%281%2B3%2B5%2B7%2B.%2B99%2B101%29-%282%2B4%2B6%2B8%2B.%2B98%2B100%29%E8%BF%99%E9%A2%98%E6%80%8E%E4%B9%88%E5%81%9A%2C)
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(1+3+5+7+.+99+101)-(2+4+6+8+.+98+100)这题怎么做,
(1+3+5+7+.+99+101)-(2+4+6+8+.+98+100)这题怎么做,
(1+3+5+7+.+99+101)-(2+4+6+8+.+98+100)这题怎么做,
(1+3+5+…+99+101)-(2+4+6+…+98+100)
=(1-2)+(3-4)+.+(99-100)+101
=-1x50+101
=51
如果本题有什么不明白可以追问,
(1+3+5+7+......+99+101)-(2+4+6+8+......+98+100)
=1+(3-2)+(5-4)+....+(99-98)+(101-100) 共50个括号
=1+1+1+....+1
=51
1+3+5+…+99+101)-(2+4+6+…+98+100)
=(1-2)+(3-4)+......+(99-100)+101
=-1x50+101
=51