怎样简便就怎样计算。7/8+5/12一1/6，17/14一11/12一1/12，5/9十7/15十
怎样简便就怎样计算。7/8+5/12一1/6，17/14一11/12一1/12，5/9十7/15十8/18十4/9，5/9一（5/9一7/12），10一2/9一7/9，1一[1/7一（1/5一1/6）]
第1个回答 2016-05-20
7/8+5/12一1/6
=7/8+5/12一2/12
=7/8+2/8
=9/8
17/14一11/12一1/12
=17/14-(11/12+1/12)
=17/14-1
=3/14
5/9十7/15十8/18十4/9
=(5/9+4/9)+(7/15+4/9)
=1+21/45+20/45
=1又41/45
5/9一（5/9一7/12）
=5/9-5/9+7/12
=7/12
10一2/9一7/9
=10-(2/9+7/9)
=10-1
=9
1一[1/7一（1/5一1/6）]
=1-1/7+1/30
=6/7+1/30
=187/210本回答被网友采纳
=7/8+5/12一2/12
=7/8+2/8
=9/8
17/14一11/12一1/12
=17/14-(11/12+1/12)
=17/14-1
=3/14
5/9十7/15十8/18十4/9
=(5/9+4/9)+(7/15+4/9)
=1+21/45+20/45
=1又41/45
5/9一（5/9一7/12）
=5/9-5/9+7/12
=7/12
10一2/9一7/9
=10-(2/9+7/9)
=10-1
=9
1一[1/7一（1/5一1/6）]
=1-1/7+1/30
=6/7+1/30
=187/210本回答被网友采纳
第2个回答 2016-05-19
8
相似回答
