Question

Tính nhanh

2004x2006-2003 / 2005x2005-2004

Answer 1

\(2004\)x\(2006-\frac{2003}{2005}\)x\(2005-2004\)

\(=2004\)x\(2006-\frac{2003}{2005}\)x\(\frac{2005}{1}-2004\)

\(=2004\)x\(2006-2003-2004\)

\(=2006-2003\)

\(=3\)

Answer 2

   2004 x 2006 - 2003 / 2005 x 2005 - 2004

= 2004 x ( 2005 + 1 ) - 2003 / ( 2004 + 1 ) x 2005 - 2004

= 2004 x 2005 + 2004 x 1 - 2003 / 2004 x 2005 + 1 x 2005 - 2004

= 2004 x 2005 + 2004 - 2003 / 2004 x 2005 + 2005 - 2004

= 2004 x 2005 + 1 / 2004 x 2005 + 1

= 1 / 1 = 1

Nếu có sai chỗ nào thì chỉ mk nha !

Hok tốt !