Question

Tính 2009.2010 -2009 / 2008.2010 + 2009 =?

Answer 1

\(\frac{2009.2010-2009}{2008.2010+2009}=\frac{2008.2010+2008-2009}{2008.2010+2009}=\frac{2008.2010+\left(-1\right)}{2008.2010+2009}=1\frac{-1}{2009}\)

đúng nah

Answer 2

\(\frac{2009.2010-2009}{2008.2010+2009}=\frac{2008.2010+2010-2009}{2008.2010+2009}=\frac{2008.2010+1}{2008.2010+2009}=1-\frac{2008}{2008.2010+2009}\)

Answer 3

\(\frac{2009.2010-2009}{2008.2010+2009}=\frac{\left(2008+1\right).2010-2009}{2008.2010+2009}=\frac{2008.2010+2010-2009}{2008.2010+2009}=\frac{2008.2010+1}{2008.2010+2009}=\frac{1}{2009}\)