一共吃掉:50xa=50a
所以還剩:500-50a=50(10-a)~???????????????????????????????
食堂原有500千克大米,吃掉a袋,每袋50千克,還剩多少千克大米
食堂原有500千克大米,吃掉a袋,每袋50千克,還剩多少千克大米
數(shù)學人氣：435 ℃時間：2019-11-10 15:38:47
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