发布网友 发布时间:2023-08-06 20:38
共3个回答
热心网友 时间:2024-12-04 16:20
1/6+1/12+1/20+1/30热心网友 时间:2024-12-04 16:20
1/6+1/12+1/20+1/30=10/60+5/60+3/60+2/60=20/60=1/3热心网友 时间:2024-12-04 16:21
=(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+(1/5-1/6)追答=(1/3+1/2)+(1/4+1/3)+(1/5+1/4)
=1/2+1/5+2*(1/3+1/4)
=7/10+7/6
=21/30+35/30
=56/30
=28/15