Question

Tính nhanh lớp 4  : 2007/2008 - 2006/2007

 

Answer 1

\(\dfrac{2007}{2008}-\dfrac{2006}{2007}=\dfrac{2007}{2008\times2007}-\dfrac{2006}{2007\times2008}\)

\(=\dfrac{2007-2006}{2007\times2008}=\dfrac{1}{2007\times2008}=\dfrac{1}{4030056}\)

 

Answer 2

ta xét phần bù:

1-2007/2008=1/2008;1-2006/2007=1/2007

vì 1/2008<1/2007 nên 2007/2008>2006/2007