Question

Tính nhanh .\(\frac{2009x2010+20}{2010x2010-1990}\)

Answer 1

 \(\frac{2009x2010+20}{2009x2010-1990}\)

=\(\frac{2009x2010+20}{2009x2010+2010-1990}\)

=\(\frac{2009x2010+20}{2009x2010+20}\)

Answer 2

\(\frac{2009+20}{2010-1990}=\frac{2029}{20}=>\frac{2009x2010+20}{2010x2010-1990}=\frac{2029}{20}\)

Answer 3

\(\frac{2009x2010+20}{20102x2010-1990}\)

=\(\frac{2009x2010+20}{2009x2010+2010-1990}\)

=\(\frac{2009x2010+20}{2009x2010+20}\)

= 1

Answer 4

\(\frac{2009x2010+20}{2010x2010-1990}=\frac{2009x2010+20}{2009x2010+2010-1990}=\frac{2009x2010+20}{2009x2010+20}=1\)