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](/uploads/image/z/18944595-27-5.jpg?t=%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97%EF%BC%9A1.2003%2F2004%2A2005+2.276%2B543%2A275%2F276%2A543-276)
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
(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