|1/2009-1/2008|+|1/2008-1/2007|+|1/2007-1/2006|-|1/2006-1/20
|1/2009-1/2008|+|1/2008-1/2007|+|1/2007-1/2006|-|1/2006-1/20
1/2009—1/2010+1/2008-1/2009+1/2007-1/2008+1/2006-1/2007+1/20
1/2009-1/2008|+|1/2008-1/2007|+|1/2007-1/2006|+.+|1/3-1/2|+|
|2009/1-2008/1|+|2008/1-2007/1|+|2007/1-2006/1|+.+|3/1-2/1|+
|1/2008-1/2007|+|1/2007-1/2006|+|1/2006-1/2005|+|1/2005-1/20
2006/(2006*2006/2007) +1/2008
2009-2008+2007-2006+~+3-2+1
2006×2008×(1/2006×2007+1/2007×2008)怎么算?
2005×2006×2007×2008+1
2006/(20062006/2007)+1/2008
|1/2007-1/2006|+|1/2008+1/2006|+|1/2008-1/2007|
初一数学|1/2007-1/2006|-|1/2008-1/2006|+|1/2008-1/2007|