以下是常用分数与小数的互化表,包含25个常见分数的转换结果:
一、分数转小数
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$\frac{1}{2} = 0.5$
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$\frac{1}{3} \approx 0.333$
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$\frac{1}{4} = 0.25$
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$\frac{1}{5} = 0.2$
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$\frac{1}{6} \approx 0.167$
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$\frac{1}{8} = 0.125$
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$\frac{1}{9} \approx 0.111$
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$\frac{1}{10} = 0.1$
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$\frac{1}{12} \approx 0.083$
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$\frac{1}{16} = 0.0625$
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$\frac{1}{20} = 0.05$
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$\frac{1}{25} = 0.04$
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$\frac{1}{50} = 0.02$
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$\frac{1}{100} = 0.01$
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$\frac{3}{10} = 0.3$
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$\frac{3}{4} = 0.75$
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$\frac{7}{10} = 0.7$
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$\frac{4}{5} = 0.8$
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$\frac{9}{10} = 0.9$
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$\frac{11}{20} = 0.55$
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$\frac{13}{25} = 0.52$
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$\frac{17}{20} = 0.85$
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$\frac{19}{20} = 0.95$
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$\frac{23}{25} = 0.92$
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$\frac{24}{25} = 0.96$
二、小数转分数(部分示例)
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$0.5 = \frac{1}{2}$
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$0.25 = \frac{1}{4}$
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$0.75 = \frac{3}{4}$
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$0.125 = \frac{1}{8}$
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$0.333 \approx \frac{1}{3}$
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$0.666 \approx \frac{2}{3}$
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$0.1 = \frac{1}{10}$
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$0.2 = \frac{1}{5}$
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$0.7 = \frac{7}{10}$
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$0.8 = \frac{4}{5}$
注:部分分数为近似值,如$\frac{1}{3}$和$\frac{2}{3}$,实际转换时可根据精度要求保留更多小数位。建议结合乘法口诀或记忆方法(如分子乘5或4后移动小数点)提高效率。