1、(0.125)^2004*(-8)^2005
=(1/8)^2004*(-8)^2004*(-8)
=[(1/8)*(-8)]^2004*(-8)
=(-1)^2004*(-8)
=-8
2、是不是5/13啊
(5/13)^2005*2.6^2004
=(5/13)^2004*(5/14)*(13/5)^2004
=[(5/13)*(13/5)]^2004*(5/14)
=5/13
3、0.125^2005*2^2005^3
=0.125^2005*2^3^2005
=0.125^2005*8^2005
=(0.125*8)^2005
=1
