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：2024/11/16 22:52:18
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？？？