初一绝对值思考题▏1/3-1/2▏+▏1/4-1/3▏+▏1/5-1/4▏+…+▏1/2004-1/2003▏

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初一绝对值思考题▏1/3-1/2▏+▏1/4-1/3▏+▏1/5-1/4▏+…+▏1/2004-1/2003▏
x){1Ɏ>]iÞg s_44\4Ѵ~C}c]C}# K3

初一绝对值思考题▏1/3-1/2▏+▏1/4-1/3▏+▏1/5-1/4▏+…+▏1/2004-1/2003▏
初一绝对值思考题
▏1/3-1/2▏+▏1/4-1/3▏+▏1/5-1/4▏+…+▏1/2004-1/2003▏

初一绝对值思考题▏1/3-1/2▏+▏1/4-1/3▏+▏1/5-1/4▏+…+▏1/2004-1/2003▏
原式=1/2-1/3+1/3-1/4+1/4-1/5+…+1/2003-1/2004
=1/2+(-1/3+1/3)+(-1/4+1/4)+…+(-1/2003+1/2003)-1/2004
=1/2-1/2004
=(1002-1)/2004
=1001/2004

原式 去掉绝对值为
1/2-1/3+1/3-1/4+1/4-1/5+…+1/2003-1/2004
化简得
1/2-1/2004
=1001/2004

原式=1/2+(-1/3+1/3)+(-1/4+1/4)+…+(-1/2003+1/2003)-1/2004
=1/2-1/2004
=1001/2004

1001/2004

1001/2004