\(\frac{2005x2006+4012}{2005x2007+2007}=\frac{2005x2006+4012}{2005x\left(2006+1\right)+2007}\)
\(=\frac{2005x2006+4012}{2005x2006+2005+2007}\)
\(=\frac{2005x2006+4012}{2005x2006+4012}\)
\(=1\)
tính bằng cách nhanh nhất 1988 + 2005 x 2006 /2007 x 2005 - 17
tinh nhanh
2006*2007-1977
2006*2005+2015
2006 x 2007 -1997
2006 x 2005 + 2005
Tính nhanh
a) 12/5 x 8 - 4 x 14/5
b) 2005 x 2007 - 1 / 2004 + 2005 x 2006
D= 2006 x 2007 - 2593 / 2005 x 2006 - 1419
tính a
2005/2006+2006/2007+2007/2008+2008/2005
2007-(2005-x)=2006
tinh gia tri cua bieu thuc :
a] (18 1/2 + 5 3/8 - 7 5/24) : 16 2/3
b] 2005 x 2007 -1 / 2004 + 2005 x 2006
2006 x 2007 - 1997
2006 x 2005 + 2015
