\(a-b+c+d=\frac{2008}{2009}-\frac{2009}{2008}+\frac{1}{2009}+\frac{2007}{2008}\)
\(=\left(\frac{2008}{2009}+\frac{1}{2009}\right)-\left(\frac{2009}{2008}-\frac{2007}{2008}\right)\)
\(=1-\frac{2}{2008}\)
\(=\frac{1003}{1004}\)
Các câu hỏi tương tự
Bài 1 ; Cho a=2008/2009:b=2009/2008:c=1/2009:d=2007/2008. Tính a-b+c+d
cho a =2008/2009;b=2009/2008;c=1/2009;d=2007/2008.tính a-b+c+d
cho a =\(\frac{2008}{2009}\),b=\(\frac{2009}{2008}\),c=\(\frac{1}{2009}\),d=\(\frac{2007}{2008}\)tính a-b+c+d
cho A= 2007/2008 + 2008/2009 + 2009/2010
Cho B= 2007 + 2008 +2009/ 2008 + 2009 + 2010
Hãy so sánh A vá B.
1.A=(2/3+3/4+4/5+................+99/100)*(1/2+2/3+..............+98/99);B=(1/2+2/3+..............+99/100)*(2/3+3//4+...................+98/99)
Tính A và B bằng cách thuận tiện nhất.
2.Cho a=2008/2009;b=2009/2008;c=1/2009;d=2007/2008
Tính a-b+c+d
3.Tìm STN m biết:
2016+m/m+2520+m/m+3024+m/m
tính:
C=2007/2008 x 1/2009 + 2007/2008 : 2009/2008 + 1/2008
2007/2008.1/2009 + 2007/2008 +2009/2008+1/2008
tính phép tính sau:
\(\frac{2008}{2009}-\frac{2009}{2008}+\frac{1}{2009}+\frac{2007}{2008}\)
tính nhanh : \(\frac{2007}{2008}\times\frac{1}{2009}+\frac{2007}{2008}:\frac{2009}{2008}+\frac{1}{2008}\)