专项提升卷3 比
专项提升卷3 比提升点1:化简比与求比值的区别1.求比值。0.4∶0.081.25∶60.625∶米∶45分米∶时∶15分2.化简比。36∶18 10∶0.87.8∶3.9 ∶∶1.5 2.5千克∶400克75%∶25%提升点2:按比例分配应用题3.已知几个分量的和与几个分量间的比,求各分量。(1)六(1)班共有学生50人,其中男生人数与女生人数的比是3∶2,这个班男、女生各有多少人?(2)中国农历中的“夏至”是一年中白昼最长、黑夜最短的一天。这一天,北京的白昼时间与黑夜时间的比是5∶3。白昼和黑夜分别是多少小时?4.已知两个分量的差与几个分量间的比,求各分量(或总量...
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