All the positive integers less than 49 are multiplied together.How many zeros will this product end in?

问题描述:

All the positive integers less than 49 are multiplied together.How many zeros will this product end in?

9个.(nine)有木有过程啊?= =算错了,10个。。。寻找带5和0的数就有5,10,15,20,25,30,35,40,45共9个数,但25很特殊,可以分解为5x5,可以当做两个5用,(帮你理例4x25=100,出现了两个0),所以一共会出现10个0。