“无限循环”型代数问题一般是用极限方法处理的。本文所谈的方法,仅仅涉及解一元方程等有关知识,通俗易懂,初中学生易于接受和掌握。现分类举例如下: 一、化无限循环小数为分数例1 化纯循环小数为分数。解:设 x= (1) 则100x= (2) (2)-(1)得 99x=81 ∴x=81/99=9/11一船地, The “infinite loop” algebra problem is generally handled using the limit method. The methods discussed in this article only involve solving one-dimensional equations and other related knowledge, easy to understand, and easy for junior high school students to accept and master. Examples of classification are as follows: 1. Infinitely Recycling Decimals as Fractions Example 1 Fractions of Pure Cyclic Decimals are scores. Solution: Let x= (1) then 100x= (2) (2)-(1) get 99x=81 ∴x=81/99=9/11 a boat,