1/7=0.142857142857.
2/7=0.285714285714.
3/7=0.428571428571.
4/7=0.571428571428.
5/7=0.714285714285.
6/7=0.857142857142.
7/7=1
8/7=1.142857142857.
9/7=1.285714285714.
10/7=1.428571428571.
11/7=1.571428571428.
12/7=1.714285714285.
13/7=1.857142857142.
14/7=2
.
自然数除以七的规律:
(1)若自然数是七的倍数,它除以七得整数.
(2)若自然数不是七的倍数,它除以七得循环小数,它是由142857六个数字构成,如:1/7=0.142857142857.
2/7=0.285714285714.
3/7=0.428571428571.
4/7=0.571428571428.
5/7=0.714285714285.
6/7=0.857142857142.
其顺序不变.