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2018洛陽小升初數(shù)學(xué)備考必背小數(shù)分?jǐn)?shù)互化

來源:家長幫論壇洛陽站 文章作者:洛陽尹超 2018-04-01 11:12:33

  常用分?jǐn)?shù)、小數(shù)的互化

  1/2 =0.5=50%

  1/3 ≈0.333 =33.3%

  2/3 ≈0.667=66.7%

  1/4 =0.25=25%

  3/4 =0.75=75%

  1/5 =0.2=20%

  2/5 =0.4=40%

  3/5 =0.6=60%

  4/5 =0.8=80%

  1/6 ≈0.167=16.7%

  5/6 ≈0.833=83.3%

  1/8 =0.125=12.5%

  3/8 =0.375=37.5%

  5/8 =0.625=62.5%

  7/8 =0.875=87.5%

  1/9 ≈0.111=11.1%

  1/10 =0.1=10%

  1/20=0.05=5%

  3/20=0.15=15%

  7/20=0.35=35%

  9/20=0.45=45%

  11/20=0.55=55%

  13/20=0.65 =65%

  17/20=0.85=85%

  19/20=0.95=95%

  1/16 =0.0625=6.25%

  1/32 =0.03125=3.125%

  1/64 =0.015625=1.5625%

  1/7 =0.142857142857…≈0.143 =14.3%

  2/7 =0.285714285714…≈0.286=28.6%

  3/7 =0.428571428571…≈0.429=42.9%

  4/7 =0.57142857142…≈0.571=57.1%

  5/7 =0.714285714285…≈0.714=71.4%

  6/7 =0.857142857142…≈0.857=85.7%

  熟記:142857

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