六（一）班与六（二）班举行篮球比赛，结果一班得27分，二班得36分．一班、二班得分的比是多少？一、二两班得分分别是两班总分数的几分之几？
直接写出得数．========
5个与8个合并起来，结果是多少？
直接写出得数．==÷== 3÷=×99+= 1.9÷1%= 0.25×0.24=20×（1+50%）=
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×99+
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