7/9+1/ 12 - 11 / 18
5/ 12 -(5/ 12 -1/ 10)
6-5/7-3/7
第1个回答 2019-06-10
7/9+1/12-11/18=28/36+3/36-22/36=(28+3-22)/36=9/36=1/4=0.25
5/12-(5/12-1/10)=5/12-5/12+1/10=1/10=0.1
6-5/7-3/7=42/7-5/7-3/7=(42-5-3)/7=34/7本回答被网友采纳
5/12-(5/12-1/10)=5/12-5/12+1/10=1/10=0.1
6-5/7-3/7=42/7-5/7-3/7=(42-5-3)/7=34/7本回答被网友采纳
第2个回答 2019-06-10
7/9+1/12-11/18
=7/9-11/18+1/12
=1/6+1/12
=1/4
5/12-(5/12-1/10)
=5/12-5/12+1/10
=0+1/10
=1/10
6-5/7-3/7
=6-(5/7+3/7)
=6-1
=5
=7/9-11/18+1/12
=1/6+1/12
=1/4
5/12-(5/12-1/10)
=5/12-5/12+1/10
=0+1/10
=1/10
6-5/7-3/7
=6-(5/7+3/7)
=6-1
=5
第3个回答 2019-06-10
8/11+4/9+5/9+3/11=(8/11+3/11)+(4/9+5/9)=1+1=2
5/9-(11/12-4/9)=5/9+4/9-11/12=1-11/12=1/12
2/3-5/12+1/3-5/12=2/3+1/3-(5/12+5/12)=1-10/12=1/6
5/9-(11/12-4/9)=5/9+4/9-11/12=1-11/12=1/12
2/3-5/12+1/3-5/12=2/3+1/3-(5/12+5/12)=1-10/12=1/6
第4个回答 2019-06-10
5/36+25/48 =5/12(1/3+5/4) =5/12×(4+15)/12 =95/144