1,计算下面各题用(脱式计算) 1/6+1/3+1/2 8/15+(7/30-1/5)

1,计算下面各题用(脱式计算) 1/6+1/3+1/2 8/15+(7/30-1/5) 6/7-(1/7+1/2) 9/10-(1/4-1/6)

第1个回答  2017-05-19
计算下面各题用(脱式计算)
1/6+1/3+1/2
=1/2+1/2
=1

8/15+(7/30-1/5)
=8/15+1/30
=17/30

6/7-(1/7+1/2)
=6/7-1/7-1/2
=5/7-1/2
=3/14

9/10-(1/4-1/6)
=9/10-1/12
=49/60
第2个回答  2017-05-19
1/6+1/3+1/2
=1/6+2/6+3/6
=1
8/15+(7/30-1/5)
=16/30+7/30-6/30
=17/30
6/7-(1/7+1/2)
=6/7-1/7-1/2
=12/14-2/14-7/14
=2/14
9/10-(1/4-1/6)
=9/10-1/4+1/6
=54/60-15/60+10/60
=49/60本回答被网友采纳
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