Question

请试着把下列分数化成小数

1/7
2/7
3/7
4/7
5/7
6/7

Answer 1

1/7=0.142857(142857循环)
2/7=0.285714(285714循环）
3/7=0.428571(428571循环)
4/7=0.571428(571428循环)
5/7=0.714285(714285循环)
6/7=0.857142(857142循环)

Answer 2

1/7 = 0.142857142... (142857是循环节4)

2/7 = 0.285714285... (285714是循环节4)
3/7 = 0.428571428... (428571是循环节4)
4/7 = 0.571428571... (571428是循环节4)
5/7 = 0.714285714... (714285是循环节4)
6/7 = 0.857142857... (857142是循环节4)

Answer 3

1/7=0.142857142857循环
2/7=0.285714285714循环
3/7=0.428571428571循环
4/7=0.571428571428循环
5/7=0.714285714285循环
6/7=0.857142857142循环
注意它们都是有规律的

Answer 4

999,999 除以 7 刚好是 142,857 ，所以 1/7 的循环节有六个数字，它们不停重复， 1,4,2,8,5,7

1/7 = 0.142857142...
2/7 = 0.285714285...
3/7 = 0.428571428...
4/7 = 0.571428571...
5/7 = 0.714285714...
6/7 = 0.857142857...