Peter and John had a picnic.Peter ate half of the cakes.Then John ate half of the remaining cakes and three moor.There were no cakes left.How many cakes did they take to the picnic?
问题描述：
Peter and John had a picnic.Peter ate half of the cakes.Then John ate half of the remaining cakes and three moor.There were no cakes left.How many cakes did they take to the picnic?
答
They took 12 cakes to the picnic.
Peter 吃了一半，John吃了剩下的一半，又吃了3个，没有剩下的了。说明John吃了3*2=6个，Peter吃了6个，所以一共带了12个。
答
Peter吃了一半,John吃了剩下的一半,即吃了四分之一,再吃三个就没有了,这三个就是最后剩下的四分之一,所以应该是带了12个蛋糕