“丁零零……”上课铃声响了,数学老师迈着矫健的步伐走进了教室。只见老师拿起粉笔,“刷刷刷……”很快就在黑板上写了一道题:新年快到了,刘阿姨去商店买食品,她所带的钱刚好可以买每千克4.8元的饼干12千克。她先从带的钱中拿出43.2元买了一些奶糖,剩下的钱可以买多少千克饼干? “Ding zero ... ” class bell rang, math teacher walked vigorous pace into the classroom. I saw the teacher picked up the chalk, “brush brush ... ” quickly wrote a question on the blackboard: the New Year approaching, Aunt Liu went to the store to buy food, she brought the money just to buy 4.8 yuan per kilogram 12 kilos of biscuits. She first took 43.2 yuan from the money brought out to buy some candy, the remaining money can buy how many kilograms of cookies?