2. 外语
  3. When the decimal point of a certain positive decimal number is moved six places to the right, the resulting number is 9 times th

When the decimal point of a certain positive decimal number is moved six places to the right, the resulting number is 9 times th

admin2015-03-24  40
问题 When the decimal point of a certain positive decimal number is moved six places to the right, the resulting number is 9 times the reciprocal of the original number. What is the original number?
选项
答案0.003
解析 Moving the decimal point of a positive decimal number, n, six places to the right is equivalent to multiplying n by 106. In the question, you are given that the result of such a change is 9 times the reciprocal of the original number, or 9.Therefore n(106)= 9. You can solve this equation for n as follows.

n = 0.003
The correct answer is 0.003.
This explanation uses the following strategies.
Strategy 1: Translate from Words to an Arithmetic or Algebraic Representation
Strategy 5: Simplify an Arithmetic or Algebraic Representation
转载请注明原文地址:https://kaotiyun.com/show/WwkO777K
本试题收录于： GRE QUANTITATIVE题库GRE分类
0

GRE QUANTITATIVE

GRE

相关试题推荐
随机试题
最新回复(0)