What is called a repeating number ? study page 28 by yourself 什么叫循环节？自学第28页。
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Teaching aims : understand the essence of repeating decimals . grasp the method for showing repeating decimals . be able to recognize the repeating decimals 教学目的：理解循环小数的意义，掌握循环小数的表示方法，能正确认识循环节。
