Question

So sánh hai phân số sau bằng cách nhanh nhất : ( ai lm đc , nhanh nhất, đúng thì mk tick lại ) .........

\(\frac{2008}{2009}\) và \(\frac{1995}{1996}\)

Answer 1

\(\frac{2008}{2009}=\frac{1995}{1996}\)

Answer 2

Ta có :

1 - 2008/2009 = 2009/2009 - 2008/2009 = 1/2009

1 - 1995/1996 = 1996/1996 - 1995/1996 = 1/1996

Vì 1/2009 < 1/1996 => 2008/2009 > 1995/1996

Answer 3

\(\frac{2008}{2009}=\frac{2009-1}{2009}=1-\frac{1}{2009}\)

\(\frac{1995}{1996}=\frac{1996-1}{1996}=1-\frac{1}{1996}\)

\(2009>1996\Rightarrow\frac{1}{2009}<\frac{1}{1996}\Rightarrow1-\frac{1}{2009}>1-\frac{1}{1996}\Rightarrow\frac{2008}{2009}>\frac{1995}{1996}\)

Answer 4

Vì 1 - 2008/2009 =1/2009

     1 - 1995/1996 =1/1996

=>1/2009 < 1/1996

=>2008/2009 > 1995/1996