简便计算,1 又1/2000+2 又3/2000+3 又5/2000+.+50 又99/2000=?一定要简便,1 又1/2000+2 又3/2000+3 又5/2000+.......+50 又99/2000=?
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![简便计算,1 又1/2000+2 又3/2000+3 又5/2000+.+50 又99/2000=?一定要简便,1 又1/2000+2 又3/2000+3 又5/2000+.......+50 又99/2000=?](/uploads/image/z/10360021-13-1.jpg?t=%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%2C1+%E5%8F%881%2F2000%2B2+%E5%8F%883%2F2000%2B3+%E5%8F%885%2F2000%2B.%2B50+%E5%8F%8899%2F2000%3D%3F%E4%B8%80%E5%AE%9A%E8%A6%81%E7%AE%80%E4%BE%BF%2C1+%E5%8F%881%2F2000%2B2+%E5%8F%883%2F2000%2B3+%E5%8F%885%2F2000%2B.......%2B50+%E5%8F%8899%2F2000%3D%3F)
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