不好意思,快考试了,还有一堆数学疑问,请高手帮忙阿,跪谢
GWD7 数学
1. Which of the following fractions has a decimal equivalent that is a terminating decimal?
10/189; 15/196; 16/225; 25/144; 39/128
答案选E. 这类题目怎么做阿? 一个一个计算吗? 非常长的数字,请高手指点
2. What is the sum of a certain pair of consecutive odd integers?
(1) at least one of the integers is negative
(2) at least one of the integers is positive
答案选C. 看不懂题目 >.< | 
