1-1/2+1/6+1/12+1/20+1/30+1/42必须用简便方法
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/25 16:24:20
![1-1/2+1/6+1/12+1/20+1/30+1/42必须用简便方法](/uploads/image/z/2488793-41-3.jpg?t=1-1%2F2%2B1%2F6%2B1%2F12%2B1%2F20%2B1%2F30%2B1%2F42%E5%BF%85%E9%A1%BB%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95)
1-1/2+1/6+1/12+1/20+1/30+1/42必须用简便方法
1-1/2+1/6+1/12+1/20+1/30+1/42必须用简便方法
1-1/2+1/6+1/12+1/20+1/30+1/42必须用简便方法
你好
1-1/2+1/6+1/12+1/20+1/30+1/42
=1-1/2+(1/2-1/3)+(1/4-1/5)+(1/5-1/6)+(1/6-1/7)
=1-1/2+1/2-1/3+1/4-1/5+1/5-1/6+1/6-1/7
=1-1/7
=6/7
【数学辅导团】为您解答,如果本题有什么不明白可以追问,如果满意记得采纳
祝学习进步!