分析:根據(jù)題意,17末尾不是的數(shù)是7,250末尾不是0的數(shù)是5,7×5=35,末尾數(shù)沒有0,那么,要使積的末尾有3個0,那么這兩個因數(shù)的末尾0的個數(shù)和應(yīng)該哦是3個,然后再進一步解答即可.
解答:解:17末尾不是的數(shù)是7,250末尾不是0的數(shù)是5,7×5=35,末尾數(shù)沒有0;
要使積的末尾有3個0,17的末尾0的個數(shù)加上250的末尾0的個數(shù)是3個,那么17的末尾后面要有2個0才可以.
故選:B.
點評:兩個因數(shù)相乘,當(dāng)這兩個因數(shù)末尾不是0的數(shù)相乘積末尾沒有0,那么這兩個因數(shù)相乘積的末尾0的個數(shù)就是這兩個因數(shù)末尾0的個數(shù)和.