\(\frac{2010.2009-1}{2008.2010+2009}:\frac{1}{1999}\)= \(\frac{2010.2008+2010-1}{2008.2010+2009}\): \(\frac{1}{1999}\)
= \(\frac{2010.2008+2009}{2008.2010+2009}:\frac{1}{1999}\)
= 1 :\(\frac{1}{1999}\)= 1999 .
2010.2009—1/2008.2010+2009:1/1999
2010.2009-1/2008.2010+2009:1/1999
\(y=\frac{2010.2009-2}{2008+2008.2010}+\frac{-2009.20102010}{20092009.2010}\)
Tính nhanh :
2010.2009-1 / 2008 - 2010 + 2009
-2010.2009+109/2008.2010+1990
Tính nhanh \(K=\frac{4}{2.4}+\frac{4}{4.6}+\frac{4}{6.8}+...+\frac{4}{2008.2010}\)
Tính nhanh
1)A=\(\frac{7}{10.11}+\frac{7}{11.12}+\frac{7}{12.13}+...+\frac{7}{69.70}\)
2)B=\(\frac{1}{25.27}+\frac{1}{27.29}+\frac{1}{29.31}+...+\frac{1}{73.75}\)
3)C=\(\frac{4}{2.4}+\frac{4}{4.6}+\frac{4}{6.8}+...+\frac{4}{2008.2010}\)
tính nhanh : A= \(28\frac{7}{2008}+\frac{2008}{2009}+\frac{2001}{2008}+\frac{1}{2009}\)
Tính
A=\(\frac{\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+.....+\frac{1}{2000}}{\frac{1999}{1}+\frac{1998}{2}+\frac{1997}{3}+......+\frac{1}{1999}}\)
Ai nhanh và đúng mình tick cho
