分数化简和写答安一.化简:(1)1996+1998+2000+2002+2004+2006+2008 ----------------------------------= 1197+1999+2001+2003+2005+2007+2009我来试一试:2005 98----X2007= 200X-- 2006 9
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![分数化简和写答安一.化简:(1)1996+1998+2000+2002+2004+2006+2008 ----------------------------------= 1197+1999+2001+2003+2005+2007+2009我来试一试:2005 98----X2007= 200X-- 2006 9](/uploads/image/z/5179411-19-1.jpg?t=%E5%88%86%E6%95%B0%E5%8C%96%E7%AE%80%E5%92%8C%E5%86%99%E7%AD%94%E5%AE%89%E4%B8%80.%E5%8C%96%E7%AE%80%EF%BC%9A%EF%BC%881%EF%BC%891996%2B1998%2B2000%2B2002%2B2004%2B2006%2B2008+++++----------------------------------%3D+++++1197%2B1999%2B2001%2B2003%2B2005%2B2007%2B2009%E6%88%91%E6%9D%A5%E8%AF%95%E4%B8%80%E8%AF%95%EF%BC%9A2005+++++++++++++++++98----X2007%3D+++++++200X--+++++++2006+++++++++++++++++9)
分数化简和写答安一.化简:(1)1996+1998+2000+2002+2004+2006+2008 ----------------------------------= 1197+1999+2001+2003+2005+2007+2009我来试一试:2005 98----X2007= 200X-- 2006 9
分数化简和写答安
一.化简:
(1)1996+1998+2000+2002+2004+2006+2008
----------------------------------=
1197+1999+2001+2003+2005+2007+2009
我来试一试:
2005 98
----X2007= 200X--
2006 99
急!
第1题改为
(1)1999+1998+2000+2002+2004+2006+2008
--------------------------------------------------------------=
1997+1999+2001+2003+2005+2007+2009
能写一个写一个!
分数化简和写答安一.化简:(1)1996+1998+2000+2002+2004+2006+2008 ----------------------------------= 1197+1999+2001+2003+2005+2007+2009我来试一试:2005 98----X2007= 200X-- 2006 9
(1)
=(2000-1)+(2000-2)+2000+(2000+2)+(2000+4)+(2000+6)+(2000+8)
=2000x7-1-2+2+4+6+8
=14000+17
=14017
=(2000-3)+(2000-1)+(2000+1)+(2000+3)+(2000+5)+(2000+7)+(2000+9)
=2000x7-3-1+1+3+5+7+9
=14000+21
=14021