1/6+1/12+1/20.+1/9900=?

来源：学生作业帮编辑：大师作文网作业帮分类：数学作业时间：2024/09/30 02:19:10

1/6+1/12+1/20.+1/9900=?
知道的亲们,求告诉

1/6+1/12+1/20+.+1/9900
=1/2*3+1/3*4+1/4*5+...1/99*100
=(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+...(1/99-1/100)
=1/2-1/3+1/3-1/4+1/4-1/5+...1/99-1/100
=1/2-1/100
=49/100

1/6+1/12+1/20.+1/9900=? 1/2+1/6+1/12+1\20+1/30+1/42+.+1/9900=? 1/2+1/6+1/12+1/20+.+1/9900 1/2+1/6+1/12+1/20+1/30+.+1/9900=? 1/2+1/6+1/12+1/20……1/9702+1/9900=? 六年级下册数学基训45页一题是己知1/6等于1/2-1/3怎么算1/6+1/12+1/20.+1/9900 1/2+1/6+1/12+.+1/9900 1/6+1/12+20/1+...+1/9900 1/2+1/6+1/12+...1/9702+1/9900= 1/6+1/12+1/20+1/30+……+1/9900=? 1/6+1/12+1/20+1/30+.+1/9900=? 1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+.1/9900=?