5/6-5/12-7/18 6/11+8/13+5/11 2-8/15-7/15
请在一天之内给我答案
能简便的要简便
9/16+3/8+7/16+1/8
5/9+4/7+4/9
6/13-3/7+13/7-2/7
8/9+(2/3-1/2)
1+3/4-7/12
2/3-(1/5+1/6)
第1个回答 2011-08-22
69/16+3/8+7/16+1/8=(9/16+7/16)+(3/8+1/8)=1+1/2=3/2
5/9+4/7+4/9=5/9+4/9+4/7=1+4/7=11/7
6/13-3/7+13/7-2/7=6/13+(13/7-3/7-2/7)=6/13+8/7=42/91+104/91=156/91
8/9+(2/3-1/2)=8/9+6/9-1/2=28/18-9/18=19/18
1+3/4-7/12=1+(9/12-7/12)=1+1/6=7/6
2/3-(1/5+1/6)=4/6-1/6-1/5=1/2-1/5=3/10
5/6-5/12-7/18=30/36-15/36-14/36=1/36
6/11+8/13+5/11 =(6/11+5/11)+8/13=1+8/13=21/13
2-8/15-7/15 =-6/15-7/15=-13/15
可以不?本回答被提问者采纳
5/9+4/7+4/9=5/9+4/9+4/7=1+4/7=11/7
6/13-3/7+13/7-2/7=6/13+(13/7-3/7-2/7)=6/13+8/7=42/91+104/91=156/91
8/9+(2/3-1/2)=8/9+6/9-1/2=28/18-9/18=19/18
1+3/4-7/12=1+(9/12-7/12)=1+1/6=7/6
2/3-(1/5+1/6)=4/6-1/6-1/5=1/2-1/5=3/10
5/6-5/12-7/18=30/36-15/36-14/36=1/36
6/11+8/13+5/11 =(6/11+5/11)+8/13=1+8/13=21/13
2-8/15-7/15 =-6/15-7/15=-13/15
可以不?本回答被提问者采纳
第2个回答 2011-08-21
去SHI吧,看不清。问题有乱七八糟。
最重要 的是没分啊。
最重要 的是没分啊。
第3个回答 2011-08-22
9/16+3/8+7/16+1/8=(9/16+7/16)+(3/8+1/8)=1+1/2=3/2
5/9+4/7+4/9=5/9+4/9+4/7=1+4/7=11/7
6/13-3/7+13/7-2/7=6/13+(13/7-3/7-2/7)=6/13+8/7=42/91+104/91=156/91
8/9+(2/3-1/2)=8/9+6/9-1/2=28/18-9/18=19/18
1+3/4-7/12=1+(9/12-7/12)=1+1/6=7/6
2/3-(1/5+1/6)=4/6-1/6-1/5=1/2-1/5=3/10
5/9+4/7+4/9=5/9+4/9+4/7=1+4/7=11/7
6/13-3/7+13/7-2/7=6/13+(13/7-3/7-2/7)=6/13+8/7=42/91+104/91=156/91
8/9+(2/3-1/2)=8/9+6/9-1/2=28/18-9/18=19/18
1+3/4-7/12=1+(9/12-7/12)=1+1/6=7/6
2/3-(1/5+1/6)=4/6-1/6-1/5=1/2-1/5=3/10
第4个回答 推荐于2021-01-26
9/16+3/8+7/16+1/8
=9/16+7/16+3/8+1/8
=1+1/2
=3/2
=9/16+7/16+3/8+1/8
=1+1/2
=3/2