20/4/2/67/5/11/72/5找规律
1个回答
关注
![]()
展开全部
# 5/6+2/9+7/18
## =15/18+4/18+7/18
## =13/9
# 11/12-(3/8-1/12)
## =11/12+1/12-3/8
## =1-3/8=5/8
# 2/3-1/4-1/6
## =8/12-3/12-2/12
## =1/4
# 7/11-1/5+8/11-4/5
## =(7/11+8/11)-(1/5+4/5)
## =15/11-1
## =4/11
咨询记录 · 回答于2024-01-16
20/4/2/67/5/11/72/5找规律
5/6+2/9+7/18
= 15/18+4/18+7/18
= 13/9
11/12-（3/8-1/12）
= 11/12+1/12-3/8
= 1-3/8 = 5/8
2/3-1/4-1/6
= 8/12-3/12-2/12
= 1/4
7/11-1/5+8/11-4/5
= (7/11+8/11)-(1/5+4/5)
= 15/11-1
= 4/11
# 1/3+4+2/3-7/20
= 1/3+2/3+4-7/20
= 5-7/20
= 4又13/20
# 一又五分之八+四又七分之十三+（四又八分之三--三又七分之十三）
= 1又5/8+4又7/13+(4又3/8-3又7/13)
= (1又5/8+4又3/8)+(4又7/13-3又7/13)
= 6+1=7
已赞过
评论
收起
你对这个回答的评价是？