1/2009—1/2010+1/2008-1/2009+1/2007-1/2008+1/2006-1/2007+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|-|1/2006-1/20
化简:|1/2010-1/2009|+|1/2009-1/2008|+|1/2008-1/2007|-|1/2007-1
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|+
计算:|1/2008-1/2007|+|1/2009-1/2008|+|1/2010-1/2009|-|1/2010-1
2010*2009-2009*2008+2008*2007-2007*2006.+2*1
用简便方法计算1/2007*1/2008+1/2008*1/2009+1/2009*1/2010+1/2010*1/20
2009-2008+2007-2006+~+3-2+1
数学题哈化简 |1/2010-1/2009|+|1//2009-1/2008|+|1/2008-1/2007|-|1/2
2008+2009*2007/2008*2009-1
2008×2009-1分之2008+2009×2007