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MGSM / 布列塔尼和她的妈妈去博物馆。门票费用是成人 12 美元,儿童 10 美元。布列塔尼的妈妈给收银员 1 张儿童票和 1 张成人票的钱。如果她收到 8 美元的找零,…

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布列塔尼和她的妈妈去博物馆。门票费用是成人 12 美元,儿童 10 美元。布列塔尼的妈妈给收银员 1 张儿童票和 1 张成人票的钱。如果她收到 8 美元的找零,则她给了收银员多少美元?

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