计算:2+4+6+8+······+2000

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计算:2+4+6+8+······+2000计算:2+4+6+8+······+2000计算:2+4+6+8+······+20002+4+6+8+……+2000=(2+2000)*2000/4=20

计算:2+4+6+8+······+2000
计算:2+4+6+8+······+2000

计算:2+4+6+8+······+2000
2+4+6+8+……+2000
=(2+2000)*2000/4
=2002*500
=1001000

(2+2000)*2000/4=1001000

2+4+6+8+······+2000
=(2+2000)+(4+1998)+(6+1996)+。。。。+(1000+1002)
=2002*(2000/2/2)
=1001000

用等差数列知识,首项为2,公差为2,用求和公式做