1/8+1/24+1/48+1/80

soloboa2022-10-04 11:39:541条回答

已提交,审核后显示!提交回复

共1条回复
rockid_1985 共回答了23个问题 | 采纳率95.7%
1/8+1/24+1/48+1/80
=1/2×(1/2-1/4+1/4-1/6+1/6-1/8+1/8-1/10)
=1/2×(1/2-1/10)
=1/2×4/10
=1/5
1年前

相关推荐