3减七分之一等于几
人气：365 ℃ 时间：2020-01-23 21:09:12
解答
3-1/7
=21/7-1/7
=20/7��3���ķ�֮���أ�3-9/4=12/4-9/4=3/4���һ�⣺6���߷�֮�ˣ�6-8/7=42/7-8/7=34/7����ɣ�лл
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