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便利超市推出了绿色环保行动,3个空可乐罐可以换一罐新的可乐。在野餐会前,西西豆他们买了六罐可乐。爸爸让他们想一想,如果用空罐参加活动,一共可以喝到多少罐可乐呢?
Convenience supermarket launched a green action, 3 empty Coke can change a new can of Coke. Before the picnic, they bought six cans of cola. Dad asked them to think about how many cans of Coke they can drink with an empty can.