简算:(2+4+6+.+2000)-(1+3+5+...+1999) 简算:(1+3+5+7+...99+101)-(2
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简算:(2+4+6+.+2000)-(1+3+5+...+1999) 简算:(1+3+5+7+...99+101)-(2+4+6+8+..+98+100)
![简算:(2+4+6+.+2000)-(1+3+5+...+1999) 简算:(1+3+5+7+...99+101)-(2](/uploads/image/z/8123317-61-7.jpg?t=%E7%AE%80%E7%AE%97%EF%BC%9A%282%2B4%2B6%2B.%2B2000%29-%281%2B3%2B5%2B...%2B1999%29+%E7%AE%80%E7%AE%97%EF%BC%9A%EF%BC%881%2B3%2B5%2B7%2B...99%2B101%EF%BC%89-%EF%BC%882)
简算:(2+4+6+.+2000)-(1+3+5+...+1999)
=(2-1)+(4-3)+(6-5)+...+(2000-1999)
=1+1+..+1
=1x1000
=1000
简算:(1+3+5+7+...99+101)-(2+4+6+8+..+98+100)
=1+(3-2)+(5-4)+...+(99-98)+(101-100)
=1+1+..+1
=1+1x100
=101
=(2-1)+(4-3)+(6-5)+...+(2000-1999)
=1+1+..+1
=1x1000
=1000
简算:(1+3+5+7+...99+101)-(2+4+6+8+..+98+100)
=1+(3-2)+(5-4)+...+(99-98)+(101-100)
=1+1+..+1
=1+1x100
=101
简算:(2+4+6+.+2000)-(1+3+5+...+1999) 简算:(1+3+5+7+...99+101)-(2
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