1/1X4+1/4X7+1/7X10+...+1/100X103=

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/11/06 09:31:31

1/1X4+1/4X7+1/7X10+...+1/100X103
=1/3×(1-1/4)+1/3×(1/4-1/7)+1/3×(1/7-1/10)+...+1/3×(1/100-1/103)
=1/3×(1-1/4+1/4-1/7+1/7-1/10+...+1/100-1/103)
=1/3×(1-1/103)
=1/3×102/103
=34/103
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1/1X4+1/4X7+1/7X10+...+1/100X103= 1/1x4 +1/4x7+1/7x10+.+1/100x103 急用啊 100x( 3/1x4 + 3/4x7 +3/7x10 +.3/97x100)=?注：1x4、4x7、7x10等均为分母 1/1X4+1/4X7+1/7X10+.+1/2002X2005=? 1X4/1+4X7/1+7X10/1+…+2005X2008/1=? 计算1/1x4+1/4x7+1/7x10+.+1/2002x2005+1/2005x2008 1/1x4+1/4x7+1/7x10+1/10x13+1/13X16 简便计算1/1x4+1/4x7+1/7x10+***+1/2007x2010 1/1x4+1/4x7+1/7x10+……+1/2005x2008 1/1x4+1/4x7+1/7x10+……+1/97x100 1/(1x4)+1/(4x7)+1/(7x10)+...+1/(91x94) 小学分数题：1/1x4+1/4x7+1/7x10+.+1/97x100