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其他解决方法
724999
724999=724÷999.
724÷999
724→247→472, 724.
7240999=digit7,rema∈der247
247
2470999=digit2,rema∈der472
472
4720999=digit4,rema∈der724
724
0.(724)
724/999=0.(724)
(724)=0.(724).
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循环小数在代数和统计中很常见。识别循环有助于精确计算和核对答案。