五年级数学应用题,求助!会做几道就几道①汽车由甲地出发,时速33千米,3.2小时到达乙地,回来少用0.4小时,求往返的平均速度?②纺织厂有职工519人,女工比男工的4.5倍多24人,男女工各多少人?

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