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其他解决方法
2082
2082=20÷82.
20÷82
20→36→32→74→2, 24,390.
20082=digit2,rema∈der36
36
36082=digit4,rema∈der32
32
32082=digit3,rema∈der74
74
74082=digit9,rema∈der2
2
2082=digit0,rema∈der20
20
0.(24390)
20/82=0.(24390)
(24,390)=0.(24390).
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我们做得怎么样?
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。