On Monday, my mother gave Xiaofang all the pocket money of 48 yuan a week. She used 1/2 of the total to buy school supplies that day, used the rest (1/3) on Tuesday, and used it on Wednesday. With the remaining (1/4), ..., after 1 week, she still has some money left, what is the balance?
星期一，妈妈把小芳一周48元的零花钱一次都给了她，当天她买学习用品就用去总数的(1/2)，星期二用去了余下的(1/3)，星期三用去了余下的(1/4)，…，1周结束后，她还余下了一些钱，结余是多少？
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