Any decimal that has only a finite number of nonzero digits is a terminating decimal. For example, 24, 0.82 and 5.096 are three terminating decimals. If r and s are positive integers and the ratio r/s is expressed as a decimal, is r/s is a terminating decimal?

1) 90<r<100

2) s=4

不明白这道题在考什么,请问 怎么样解题.

本题考循环小数，答案是不是B?

R在90~100之间时，不能保证R/S是有限不循环小数；而当被除数S=4的时候，不论，R的值是多少，R/S都必定是有限小数，答案B.