简便运算:1.2003/2004*2005 2.276+543*275/276*543-276
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简便运算:1.2003/2004*2005 2.276+543*275/276*543-276
简便运算:1.2003/2004*2005 2.276+543*275/276*543-276
简便运算:1.2003/2004*2005 2.276+543*275/276*543-276
2003
(1) 2005× ---------------
2004
=(2004+1)×(2003/2004)
=2003+2003/2004
=2003又2004分之2003
276+543×275 (2) ---------------------
276×543-267
=[276+543×275]/[(275+1)×543-267]
=[276+543×275]/[275×543+543-267]
=[276+543×275]/[275×543+276]
=1