If r and s are positive integers, can the fraction r/s be expressed as a decimal with only a finite number of nonzero digits?
1 s is a factor of 100
2 r is a factor of 100
答案是A 这种题应该什么思路? 不太会,答案没看懂。。。谢谢
One day 340 million shares of stocks were sold. Among them 3/4 are domestic stocks. Among all the stocks sold 3/5 belong to institutional transactions. What is the minimum number of domestic shares could be traded by private parties on that day? 想问下这道题怎么画图解决?