0.5111.的循环是几分之几
0.5111.的循环是几分之几
数学人气:820 ℃时间:2020-02-05 11:44:22
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23/45why0.5111......循环的是1,故可考虑分母为90;又小数点后第一位为5,则分子为5X9+1=46;故为46/90=23/45
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