\(=\left(\frac{2007}{2008}+\frac{1}{2008}\right)+\left(\frac{2007}{2008}.\frac{2008}{2009}+\frac{1}{2009}\right)\)

\(=1+\frac{2008}{2009}=\frac{4017}{2009}\)

\(\frac{2007}{2008}+\frac{1}{2009}+\frac{2007}{2008}:\frac{2009}{2008}+\frac{1}{2008}\)

\(=\frac{2007}{2008}+\frac{1}{2009}+\frac{2007}{2009}+\frac{1}{2008}\)

\(=\left(\frac{2007}{2008}+\frac{1}{2008}\right)+\left(\frac{2007}{2009}+\frac{1}{2009}\right)\)

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

\(=\frac{4017}{2009}\)

\(C=\frac{\frac{1}{2008}-\frac{1}{2009}-\frac{1}{2010}}{\frac{5}{2008}-\frac{5}{2009}-\frac{5}{2010}}+\frac{\frac{2}{2007}-\frac{2}{2008}-\frac{2}{2009}}{\frac{3}{2007}-\frac{3}{2008}-\frac{3}{2009}}\)

\(=\frac{\frac{1}{2008}-\frac{1}{2009}-\frac{1}{2010}}{5.\left(\frac{1}{2008}-\frac{1}{2009}-\frac{1}{2010}\right)}+\frac{2.\left(\frac{1}{2007}-\frac{1}{2008}-\frac{1}{2009}\right)}{3.\left(\frac{1}{2007}-\frac{1}{2008}-\frac{1}{2009}\right)}\)

\(=\frac{1}{5}+\frac{2}{3}\)

\(=\frac{13}{15}\)

=2008/2009-2009/2008+1/2009+2007/2008

=(2008/2009+1/2009)-(2009/2008-2007/2008)

=1-1/1004

=1003/1004

\(\frac{2008}{2009}-\frac{2009}{2008}+\frac{1}{2009}+\frac{2007}{2008}\)

=\(\left(\frac{2008}{2009}+\frac{1}{2009}\right)-\left(\frac{2009}{2008}-\frac{2007}{2008}\right)\)

=\(1-\frac{2}{2008}\)

=\(1-\frac{1}{1004}\)

=\(\frac{1003}{1004}\)

Chúc bn làm tốt nha!!!

To quá

a)2007/2008

b)2009x2009/2008x2008

bạn giải chi tiết ra nhé giúp mk với

 1999 x (2000+1)-1=1999x2000+1999-1=1999x2000+1998=1

1998+1999x2000=giữ nguyên=1998+1999x2000=1 Vậy kết quả phân số = 1 k cho mình nhé

\(\frac{2007}{2008}\)\(+\)\(\frac{2008}{2009}\)\(=\)\(\frac{2007}{2008}\)\(+\)\(\frac{2008}{2009}\)

k mk nha!!! *o~

\(\frac{2007}{2008}+\frac{2008}{2009}=\frac{2007}{2008}+\frac{2008}{2009}\)

nha                                                        ^_^

Mọi người giúp mjk cách lm nữa nhé 

Thank moj ng nhìu