Which of the following fractions has a decimal equivalent that is a terminating decimal?
~$\frac{10}{189}$~
~$\frac{15}{196}$~
~$\frac{16}{225}$~
~$\frac{25}{144}$~
~$\frac{39}{128}$~
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Which of the following fractions has a decimal equivalent that is a terminating decimal?
分母只含有2，5的分数可以化成有限小数登录 或 注册 后可以参加讨论
分别将几个分数的分母化成质因子相乘的形式，
如A.189=3^3*7 B.196=7^2*2^2 C.225=5^2*3^2 D.144=3^2*4^2 E.128=4^3*2
所以选E.