周测培优卷11 百分数的意义及应用
周测培优卷11百分数的意义及应用一、填空。(20分)1.30÷( )==( )∶( )=( )(填小数)=( )%2.28.6%读作( ),百分之零点零七写作( )。3.一瓶饮料含50%的桃汁,表示( )的质量占( )的50%。4.一件衣服以原价的85%出售,可以把( )看作单位“1”,现价比原价降低( )%。5.做400个零件,有380个是正品,这批零件的正品率是( )%,次品率是( )%。6.一天六(1)班出勤47人,因病缺勤3人,那么这天的出勤率是()%。7.甲、乙两数的比是8∶5,甲数是乙数的( )%,乙数是甲数的( )%,甲数比乙数多,...
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