下面各题,怎样简便就怎样算.3/4-2/5-1/3 4/5-3/10+4/15 3/4-(3/8下面各题,怎样简便就怎样算.3/4-2/5-1/3 4/5-3/10+4/15 3/4-(3/8+1/4)

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下面各题,怎样简便就怎样算.3/4-2/5-1/3 4/5-3/10+4/15 3/4-(3/8下面各题,怎样简便就怎样算.3/4-2/5-1/3 4/5-3/10+4/15 3/4-(3/8+1/4)
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下面各题,怎样简便就怎样算.3/4-2/5-1/3 4/5-3/10+4/15 3/4-(3/8下面各题,怎样简便就怎样算.3/4-2/5-1/3 4/5-3/10+4/15 3/4-(3/8+1/4)
下面各题,怎样简便就怎样算.3/4-2/5-1/3 4/5-3/10+4/15 3/4-(3/8
下面各题,怎样简便就怎样算.
3/4-2/5-1/3 4/5-3/10+4/15
3/4-(3/8+1/4)

下面各题,怎样简便就怎样算.3/4-2/5-1/3 4/5-3/10+4/15 3/4-(3/8下面各题,怎样简便就怎样算.3/4-2/5-1/3 4/5-3/10+4/15 3/4-(3/8+1/4)
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