作业帮1/2-1/6-1/12-1/20-1/30-1/42=?是6/7 还是1/7
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/28 17:56:53
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1/2-1/6-1/12-1/20-1/30-1/42=?是6/7 还是1/7
1/2-1/6-1/12-1/20-1/30-1/42=?是6/7 还是1/7
1/2-1/6-1/12-1/20-1/30-1/42=?是6/7 还是1/7
1/2-1/6-1/12-1/20-1/30-1/42
=2/6-1/12-1/20-1/30-1/42
=1/4-1/20-1/30-1/42
=1/5-1/30-1/42
=1/6-1/42
=6/42
=1/7
怎么可能是6/7,越减越多？？？